chore: generate lcov files

.gitignore

@@ -1,3 +1,4 @@
 node_modules/
 .nyc_output/
 .DS_Store
+coverage

.npmignore

@@ -1,2 +1,3 @@
 pnpm-lock.yaml
 test/
+coverage/

package.json

@@ -4,7 +4,7 @@
   "description": "AST Node Building api",
   "main": "index.js",
   "scripts": {
-    "test": "nyc mocha --forbid-only \"test/**/*.test.js\"",
+    "test": "nyc --reporter=lcov mocha --forbid-only \"test/**/*.test.js\"",
     "deploy-patch": "npm version patch && git push && git push --tags && npm publish",
     "deploy-minor": "npm version minor && git push && git push --tags && npm publish",
     "coverage": "nyc report --reporter=text-lcov | coveralls --verbose",