chore(package): removed unused dependencies

Author: hutson

package-lock.json

@@ -36,7 +36,6 @@
     "chai": "^3.4.1",
     "conventional-changelog-core": "^2.0.4",
     "git-dummy-commit": "^1.1.1",
-    "istanbul": "^0.4.1",
     "jscs": "^3.0.7",
     "jshint": "^2.9.1",
     "mocha": "*",

packages/conventional-changelog-angular/package-lock.json

@@ -34,7 +34,6 @@
   "devDependencies": {
     "chai": "^3.5.0",
     "conventional-changelog-core": "0.0.2",
-    "istanbul": "^0.4.2",
     "jscs": "^2.9.0",
     "jshint": "^2.9.1",
     "mocha": "*",