ci: remove coverage script and pkg, close #97

Author: Scrum

package.json

@@ -23,7 +23,6 @@
     "build": "rimraf lib && rollup -c",
     "build:w": "rimraf lib && rollup -c -w",
     "docs": "npm install --prefix src/docs && npm run build --prefix src/docs",
-    "coverage": "nyc report --reporter=text-lcov | coveralls",
     "test": "npm run build && nyc ava",
     "pretest": "clinton"
   },
@@ -47,7 +46,6 @@
     "ava": "^3.9.0",
     "clinton": "^0.14.0",
     "conventional-changelog-cli": "^2.0.34",
-    "coveralls": "^3.1.0",
     "husky": "^4.2.5",
     "lint-staged": "^10.2.10",
     "nyc": "^15.1.0",