add CI pipeline with lint, test, build

node_modules/y18n/index.mjs

@@ -0,0 +1,8 @@
+import shim from './build/lib/platform-shims/node.js'
+import { y18n as _y18n } from './build/lib/index.js'
+
+const y18n = (opts) => {
+  return _y18n(opts, shim)
+}
+
+export default y18n