Update to stable parser and eslint plugin

Author: bidoubiwa

package.json

@@ -64,8 +64,8 @@
     "@rollup/plugin-node-resolve": "^7.1.1",
     "@types/jest": "^25.2.1",
     "@types/prettier": "^2.0.0",
-    "@typescript-eslint/eslint-plugin": "2",
-    "@typescript-eslint/parser": "^3.0.0",
+    "@typescript-eslint/eslint-plugin": "2.34.0",
+    "@typescript-eslint/parser": "2.34.0",
     "brotli-size": "^4.0.0",
     "eslint": "6",
     "eslint-config-standard-with-typescript": "^17.0.0",