fix: remove/upgrade outdated deps (#11)

Co-authored-by: Chris Breiding <[email protected]>

package.json

@@ -34,8 +34,7 @@
     "extend": "~3.0.2",
     "forever-agent": "~0.6.1",
     "form-data": "~2.3.2",
-    "har-validator": "~5.1.3",
-    "http-signature": "~1.2.0",
+    "http-signature": "~1.3.6",
     "is-typedarray": "~1.0.0",
     "isstream": "~0.1.2",
     "json-stringify-safe": "~5.0.1",
@@ -64,11 +63,11 @@
     "function-bind": "^1.0.2",
     "karma": "^3.0.0",
     "karma-browserify": "^5.0.1",
-    "karma-cli": "^1.0.0",
-    "karma-coverage": "^1.0.0",
+    "karma-cli": "^2.0.0",
+    "karma-coverage": "^2.0.3",
     "karma-phantomjs-launcher": "^1.0.0",
-    "karma-tap": "^3.0.1",
-    "nyc": "^14.1.1",
+    "karma-tap": "^4.2.0",
+    "nyc": "^15.1.0",
     "phantomjs-prebuilt": "^2.1.3",
     "rimraf": "^2.2.8",
     "server-destroy": "^1.0.1",