fix: esm using import for tree shaking

Author: farfromrefug

package.json

@@ -14,7 +14,7 @@
         "tsc": "cp src/label.d.ts plugin && tsc -skipLibCheck -d",
         "clean": "rimraf ./plugin/**/*.d.ts ./plugin/**/*.js ./plugin/**/*.js.map plugin/node_modules plugin/package-lock.json",
         "build.plugin": " cp README.md plugin/ && rm -f .tsbuildinfo && npm run tsc && npm run build.plugin.esm && node ./build.esm.js",
-        "build.plugin.esm": "tsc -skipLibCheck --target es2015 --removeComments --outDir build/esm",
+        "build.plugin.esm": "tsc -skipLibCheck --target es2015 --module esnext --removeComments --outDir build/esm",
         "build.android": "bash src-native/android/build.sh",
         "build.ios": "bash src-native/ios/build.sh",
         "build.native": "npm run build.android && npm run build.ios",