diff --git a/package-lock.json b/package-lock.json
index 274a01f..89edf79 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,7 +10,7 @@
       "license": "CC0-1.0",
       "devDependencies": {
         "coffeelint": "~2.1.0",
-        "grunt": "~1.5.3",
+        "grunt": "~1.6.1",
         "grunt-coffeelint": "~0.0.16",
         "grunt-contrib-coffee": "~2.1.0",
         "grunt-contrib-connect": "~3.0.0",
@@ -401,9 +401,9 @@
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-      "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-3.0.3.tgz",
-      "integrity": "sha512-jyCETtSl3VMZMWeRo7iY1FL19ges1t55hMo5yaam4Jrsm5EPL89UQkoQRyiI+Yf4k8r2ZpdngkV8hr1lIdjb3Q==",
+      "version": "4.6.3",
+      "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-4.6.3.tgz",
+      "integrity": "sha512-2P0p0pFGzHS5EMnhdxQi7aJN+iMheud0UhG4dlE1DLAlvL8JHjJJTX/CSm4JXwV0Ka5nGk3zC5mcb5bUQUxxMA==",
       "dev": true,
       "engines": {
         "node": "*"
@@ -665,31 +665,18 @@
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-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/findup-sync/-/findup-sync-0.3.0.tgz",
-      "integrity": "sha1-N5MKpdgWt3fANEXhlmzGeQpMCxY=",
-      "dev": true,
-      "dependencies": {
-        "glob": "~5.0.0"
-      },
-      "engines": {
-        "node": ">= 0.6.0"
-      }
-    },
-    "node_modules/findup-sync/node_modules/glob": {
-      "version": "5.0.15",
-      "resolved": "https://registry.npmjs.org/glob/-/glob-5.0.15.tgz",
-      "integrity": "sha1-G8k2ueAvSmA/zCIuz3Yz0wuLk7E=",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/findup-sync/-/findup-sync-5.0.0.tgz",
+      "integrity": "sha512-MzwXju70AuyflbgeOhzvQWAvvQdo1XL0A9bVvlXsYcFEBM87WR4OakL4OfZq+QRmr+duJubio+UtNQCPsVESzQ==",
       "dev": true,
       "dependencies": {
-        "inflight": "^1.0.4",
-        "inherits": "2",
-        "minimatch": "2 || 3",
-        "once": "^1.3.0",
-        "path-is-absolute": "^1.0.0"
+        "detect-file": "^1.0.0",
+        "is-glob": "^4.0.3",
+        "micromatch": "^4.0.4",
+        "resolve-dir": "^1.0.1"
       },
       "engines": {
-        "node": "*"
+        "node": ">= 10.13.0"
       }
     },
     "node_modules/fined": {
@@ -864,32 +851,30 @@
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-      "version": "1.5.3",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.5.3.tgz",
-      "integrity": "sha512-mKwmo4X2d8/4c/BmcOETHek675uOqw0RuA/zy12jaspWqvTp4+ZeQF1W+OTpcbncnaBsfbQJ6l0l4j+Sn/GmaQ==",
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.6.1.tgz",
+      "integrity": "sha512-/ABUy3gYWu5iBmrUSRBP97JLpQUm0GgVveDCp6t3yRNIoltIYw7rEj3g5y1o2PGPR2vfTRGa7WC/LZHLTXnEzA==",
       "dev": true,
       "dependencies": {
-        "dateformat": "~3.0.3",
+        "dateformat": "~4.6.2",
         "eventemitter2": "~0.4.13",
         "exit": "~0.1.2",
-        "findup-sync": "~0.3.0",
+        "findup-sync": "~5.0.0",
         "glob": "~7.1.6",
         "grunt-cli": "~1.4.3",
         "grunt-known-options": "~2.0.0",
         "grunt-legacy-log": "~3.0.0",
         "grunt-legacy-util": "~2.0.1",
-        "iconv-lite": "~0.4.13",
+        "iconv-lite": "~0.6.3",
         "js-yaml": "~3.14.0",
         "minimatch": "~3.0.4",
-        "mkdirp": "~1.0.4",
-        "nopt": "~3.0.6",
-        "rimraf": "~3.0.2"
+        "nopt": "~3.0.6"
       },
       "bin": {
         "grunt": "bin/grunt"
       },
       "engines": {
-        "node": ">=8"
+        "node": ">=16"
       }
     },
     "node_modules/grunt-cli": {
@@ -1359,9 +1344,13 @@
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     "node_modules/iconv-lite": {
-      "version": "0.4.15",
-      "integrity": "sha1-/iZaIYrGpXz+hUkn6dBMGYJe3es=",
+      "version": "0.6.3",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
+      "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
       "dev": true,
+      "dependencies": {
+        "safer-buffer": ">= 2.1.2 < 3.0.0"
+      },
       "engines": {
         "node": ">=0.10.0"
       }
@@ -1724,18 +1713,6 @@
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       "dev": true
     },
-    "node_modules/mkdirp": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
-      "integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==",
-      "dev": true,
-      "bin": {
-        "mkdirp": "bin/cmd.js"
-      },
-      "engines": {
-        "node": ">=10"
-      }
-    },
     "node_modules/mkdirp-classic": {
       "version": "0.5.3",
       "resolved": "https://registry.npmjs.org/mkdirp-classic/-/mkdirp-classic-0.5.3.tgz",
@@ -2352,6 +2329,12 @@
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       "dev": true
     },
+    "node_modules/safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
+      "dev": true
+    },
     "node_modules/send": {
       "version": "0.17.1",
       "resolved": "https://registry.npmjs.org/send/-/send-0.17.1.tgz",
@@ -3207,9 +3190,9 @@
       "dev": true
     },
     "dateformat": {
-      "version": "3.0.3",
-      "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-3.0.3.tgz",
-      "integrity": "sha512-jyCETtSl3VMZMWeRo7iY1FL19ges1t55hMo5yaam4Jrsm5EPL89UQkoQRyiI+Yf4k8r2ZpdngkV8hr1lIdjb3Q==",
+      "version": "4.6.3",
+      "resolved": "https://registry.npmjs.org/dateformat/-/dateformat-4.6.3.tgz",
+      "integrity": "sha512-2P0p0pFGzHS5EMnhdxQi7aJN+iMheud0UhG4dlE1DLAlvL8JHjJJTX/CSm4JXwV0Ka5nGk3zC5mcb5bUQUxxMA==",
       "dev": true
     },
     "debug": {
@@ -3414,27 +3397,15 @@
       }
     },
     "findup-sync": {
-      "version": "0.3.0",
-      "resolved": "https://registry.npmjs.org/findup-sync/-/findup-sync-0.3.0.tgz",
-      "integrity": "sha1-N5MKpdgWt3fANEXhlmzGeQpMCxY=",
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/findup-sync/-/findup-sync-5.0.0.tgz",
+      "integrity": "sha512-MzwXju70AuyflbgeOhzvQWAvvQdo1XL0A9bVvlXsYcFEBM87WR4OakL4OfZq+QRmr+duJubio+UtNQCPsVESzQ==",
       "dev": true,
       "requires": {
-        "glob": "~5.0.0"
-      },
-      "dependencies": {
-        "glob": {
-          "version": "5.0.15",
-          "resolved": "https://registry.npmjs.org/glob/-/glob-5.0.15.tgz",
-          "integrity": "sha1-G8k2ueAvSmA/zCIuz3Yz0wuLk7E=",
-          "dev": true,
-          "requires": {
-            "inflight": "^1.0.4",
-            "inherits": "2",
-            "minimatch": "2 || 3",
-            "once": "^1.3.0",
-            "path-is-absolute": "^1.0.0"
-          }
-        }
+        "detect-file": "^1.0.0",
+        "is-glob": "^4.0.3",
+        "micromatch": "^4.0.4",
+        "resolve-dir": "^1.0.1"
       }
     },
     "fined": {
@@ -3572,26 +3543,24 @@
       "dev": true
     },
     "grunt": {
-      "version": "1.5.3",
-      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.5.3.tgz",
-      "integrity": "sha512-mKwmo4X2d8/4c/BmcOETHek675uOqw0RuA/zy12jaspWqvTp4+ZeQF1W+OTpcbncnaBsfbQJ6l0l4j+Sn/GmaQ==",
+      "version": "1.6.1",
+      "resolved": "https://registry.npmjs.org/grunt/-/grunt-1.6.1.tgz",
+      "integrity": "sha512-/ABUy3gYWu5iBmrUSRBP97JLpQUm0GgVveDCp6t3yRNIoltIYw7rEj3g5y1o2PGPR2vfTRGa7WC/LZHLTXnEzA==",
       "dev": true,
       "requires": {
-        "dateformat": "~3.0.3",
+        "dateformat": "~4.6.2",
         "eventemitter2": "~0.4.13",
         "exit": "~0.1.2",
-        "findup-sync": "~0.3.0",
+        "findup-sync": "~5.0.0",
         "glob": "~7.1.6",
         "grunt-cli": "~1.4.3",
         "grunt-known-options": "~2.0.0",
         "grunt-legacy-log": "~3.0.0",
         "grunt-legacy-util": "~2.0.1",
-        "iconv-lite": "~0.4.13",
+        "iconv-lite": "~0.6.3",
         "js-yaml": "~3.14.0",
         "minimatch": "~3.0.4",
-        "mkdirp": "~1.0.4",
-        "nopt": "~3.0.6",
-        "rimraf": "~3.0.2"
+        "nopt": "~3.0.6"
       }
     },
     "grunt-cli": {
@@ -3950,9 +3919,13 @@
       }
     },
     "iconv-lite": {
-      "version": "0.4.15",
-      "integrity": "sha1-/iZaIYrGpXz+hUkn6dBMGYJe3es=",
-      "dev": true
+      "version": "0.6.3",
+      "resolved": "https://registry.npmjs.org/iconv-lite/-/iconv-lite-0.6.3.tgz",
+      "integrity": "sha512-4fCk79wshMdzMp2rH06qWrJE4iolqLhCUH+OiuIgU++RB0+94NlDL81atO7GX55uUKueo0txHNtvEyI6D7WdMw==",
+      "dev": true,
+      "requires": {
+        "safer-buffer": ">= 2.1.2 < 3.0.0"
+      }
     },
     "ieee754": {
       "version": "1.2.1",
@@ -4227,12 +4200,6 @@
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       "dev": true
     },
-    "mkdirp": {
-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/mkdirp/-/mkdirp-1.0.4.tgz",
-      "integrity": "sha512-vVqVZQyf3WLx2Shd0qJ9xuvqgAyKPLAiqITEtqW0oIUjzo3PePDd6fW9iFz30ef7Ysp/oiWqbhszeGWW2T6Gzw==",
-      "dev": true
-    },
     "mkdirp-classic": {
       "version": "0.5.3",
       "resolved": "https://registry.npmjs.org/mkdirp-classic/-/mkdirp-classic-0.5.3.tgz",
@@ -4706,6 +4673,12 @@
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       "dev": true
     },
+    "safer-buffer": {
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/safer-buffer/-/safer-buffer-2.1.2.tgz",
+      "integrity": "sha512-YZo3K82SD7Riyi0E1EQPojLz7kpepnSQI9IyPbHHg1XXXevb5dJI7tpyN2ADxGcQbHG7vcyRHk0cbwqcQriUtg==",
+      "dev": true
+    },
     "send": {
       "version": "0.17.1",
       "resolved": "https://registry.npmjs.org/send/-/send-0.17.1.tgz",
diff --git a/package.json b/package.json
index 2579b48..c90eb0f 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
   "type": "module",
   "devDependencies": {
     "coffeelint":            "~2.1.0"
-  , "grunt":                 "~1.5.3"
+  , "grunt":                 "~1.6.1"
   , "grunt-coffeelint":      "~0.0.16"
   , "grunt-contrib-coffee":  "~2.1.0"
   , "grunt-contrib-connect": "~3.0.0"