fix: update test and coverage npm scripts

        - no need to provide path into node_modules
        - remove single-quotes around glob expressions
                - tests were not being run with them in place

Author: fluffynuts

package.json

@@ -4,8 +4,8 @@
   "description": "A Karma plugin. Report all spec-results to console (like mocha's spec reporter).",
   "main": "index.js",
   "scripts": {
-    "test": "./node_modules/.bin/mocha-runner --reporter spec 'test/**/*.spec.js'",
-    "coverage": "./node_modules/.bin/istanbul cover -x 'test/**/*.js' ./node_modules/.bin/mocha-runner -- --reporter spec 'test/**/*.js'"
+    "test": "mocha-runner --reporter spec test/**/*.spec.js",
+    "coverage": "istanbul cover -x test/**/*.js ./node_modules/.bin/mocha-runner -- --reporter spec test/**/*.js"
   },
   "repository": {
     "type": "git",