chore: remove docs/ before re-generating it

Author: citizensas

package.json

@@ -47,7 +47,7 @@
     "test": "karma start karma.conf.js",
     "debug": "npm run test -- --auto-watch --browsers Chrome --no-single-run",
     "build": "webpack -p --bail",
-    "docs": "typedoc --out ./docs/ ./src/ --excludePrivate --excludeExternals --exclude \"**/*.spec.ts\"",
+    "docs": "rm -rf ./docs/ && typedoc --out ./docs/ ./src/ --excludePrivate --excludeExternals --exclude \"**/*.spec.ts\"",
     "prepublish": "npm run build",
     "version": "npm run docs && node ./generate-changelog.js && git add docs CHANGELOG.md",
     "start": "http-server -a localhost -p 8000 -o --cors -c-1"