Add coverage with c8

Author: XhmikosR

.github/workflows/ci.yml

@@ -32,4 +32,4 @@ jobs:
         run: npm install
 
       - name: Run tests
-        run: npm test
+        run: npm run ci

.gitignore

@@ -1,2 +1,3 @@
 node_modules
 yarn.lock
+/coverage

package.json

@@ -15,6 +15,7 @@
 	"scripts": {
 		"ava": "ava",
 		"xo": "xo",
+		"ci": "npm run xo && c8 ava",
 		"test": "npm run xo && npm run ava"
 	},
 	"main": "index.js",
@@ -31,6 +32,12 @@
 		"local",
 		"wrapper"
 	],
+	"c8": {
+		"reporter": [
+			"lcovonly",
+			"text"
+		]
+	},
 	"dependencies": {
 		"bin-check": "^4.1.0",
 		"bin-version-check": "^5.0.0",
@@ -39,6 +46,7 @@
 	},
 	"devDependencies": {
 		"ava": "^4.0.1",
+		"c8": "^7.11.0",
 		"executable": "^4.1.1",
 		"nock": "^13.2.2",
 		"path-exists": "^5.0.0",