diff --git a/package-lock.json b/package-lock.json
index 3c38d12..0cd0987 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -189,9 +189,9 @@
 			"dev": true
 		},
 		"acorn": {
-			"version": "5.7.3",
-			"resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.3.tgz",
-			"integrity": "sha512-T/zvzYRfbVojPWahDsE5evJdHb3oJoQfFbsrKM7w5Zcs++Tr257tia3BmMP8XYVjp1S9RZXQMh7gao96BlqZOw==",
+			"version": "5.7.4",
+			"resolved": "https://registry.npmjs.org/acorn/-/acorn-5.7.4.tgz",
+			"integrity": "sha512-1D++VG7BhrtvQpNbBzovKNc1FLGGEE/oGe7b9xJm/RFHMBeUaUGpluV9RLjZa47YFdPcDAenEYuq9pQPcMdLJg==",
 			"dev": true
 		},
 		"acorn-dynamic-import": {
@@ -304,7 +304,7 @@
 				},
 				"util": {
 					"version": "0.10.3",
-					"resolved": "http://registry.npmjs.org/util/-/util-0.10.3.tgz",
+					"resolved": "https://registry.npmjs.org/util/-/util-0.10.3.tgz",
 					"integrity": "sha1-evsa/lCAUkZInj23/g7TeTNqwPk=",
 					"dev": true,
 					"requires": {
@@ -1368,7 +1368,8 @@
 				"ansi-regex": {
 					"version": "2.1.1",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"aproba": {
 					"version": "1.2.0",
@@ -1389,12 +1390,14 @@
 				"balanced-match": {
 					"version": "1.0.0",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"brace-expansion": {
 					"version": "1.1.11",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"balanced-match": "^1.0.0",
 						"concat-map": "0.0.1"
@@ -1409,17 +1412,20 @@
 				"code-point-at": {
 					"version": "1.1.0",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"concat-map": {
 					"version": "0.0.1",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"console-control-strings": {
 					"version": "1.1.0",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"core-util-is": {
 					"version": "1.0.2",
@@ -1536,7 +1542,8 @@
 				"inherits": {
 					"version": "2.0.3",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"ini": {
 					"version": "1.3.5",
@@ -1548,6 +1555,7 @@
 					"version": "1.0.0",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"number-is-nan": "^1.0.0"
 					}
@@ -1562,6 +1570,7 @@
 					"version": "3.0.4",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"brace-expansion": "^1.1.7"
 					}
@@ -1569,12 +1578,14 @@
 				"minimist": {
 					"version": "0.0.8",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"minipass": {
 					"version": "2.2.4",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"safe-buffer": "^5.1.1",
 						"yallist": "^3.0.0"
@@ -1593,6 +1604,7 @@
 					"version": "0.5.1",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"minimist": "0.0.8"
 					}
@@ -1673,7 +1685,8 @@
 				"number-is-nan": {
 					"version": "1.0.1",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"object-assign": {
 					"version": "4.1.1",
@@ -1685,6 +1698,7 @@
 					"version": "1.4.0",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"wrappy": "1"
 					}
@@ -1770,7 +1784,8 @@
 				"safe-buffer": {
 					"version": "5.1.1",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"safer-buffer": {
 					"version": "2.1.2",
@@ -1806,6 +1821,7 @@
 					"version": "1.0.2",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"code-point-at": "^1.0.0",
 						"is-fullwidth-code-point": "^1.0.0",
@@ -1825,6 +1841,7 @@
 					"version": "3.0.1",
 					"bundled": true,
 					"dev": true,
+					"optional": true,
 					"requires": {
 						"ansi-regex": "^2.0.0"
 					}
@@ -1868,12 +1885,14 @@
 				"wrappy": {
 					"version": "1.0.2",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				},
 				"yallist": {
 					"version": "3.0.2",
 					"bundled": true,
-					"dev": true
+					"dev": true,
+					"optional": true
 				}
 			}
 		},
@@ -4049,7 +4068,7 @@
 				},
 				"strip-ansi": {
 					"version": "3.0.1",
-					"resolved": "http://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
+					"resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
 					"integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
 					"dev": true,
 					"requires": {
@@ -4090,7 +4109,7 @@
 		},
 		"yargs": {
 			"version": "1.2.6",
-			"resolved": "http://registry.npmjs.org/yargs/-/yargs-1.2.6.tgz",
+			"resolved": "https://registry.npmjs.org/yargs/-/yargs-1.2.6.tgz",
 			"integrity": "sha1-nHtKgv1dWVsr8Xq23MQxNUMv40s=",
 			"dev": true,
 			"requires": {