Add Coveralls

Author: Arttse

package.json

@@ -6,7 +6,8 @@
   "scripts": {
     "lint": "eslint .",
     "lint:fix": "npm run lint -- --fix",
-    "test": "npm run lint && nyc -c ava"
+    "test": "npm run lint && nyc -c ava",
+    "coveralls": "nyc report --reporter=text-lcov | coveralls"
   },
   "engines": {
     "node": ">=0.10"
@@ -36,6 +37,7 @@
   "homepage": "https://github.com/Arttse/node.is-url-protocol-without-slashes#readme",
   "devDependencies": {
     "ava": "^1.3.1",
+    "coveralls": "^3.0.3",
     "eslint": "^5.15.1",
     "eslint-config-standard": "^12.0.0",
     "eslint-plugin-import": "^2.16.0",