refactor(*): split tasks and modules

src/cleanupNpmrc.task.js

@@ -0,0 +1,15 @@
+const core = require('@actions/core');
+const exec = require('./_exec');
+
+/**
+ * Clean up `.npmrc` file in the repo after releasing
+ * @returns {Promise<never>}
+ */
+module.exports = async () => {
+  const {stdout, stderr} = await exec(`rm -f .npmrc`);
+  core.debug(stdout);
+
+  if (stderr) {
+    return Promise.reject(stderr);
+  }
+};