Merge pull request rails#54798 from Edouard-chin/ec-actiontext-rollup

Add rollup-plugin-terser as a dev dependency in Action text:

Author: byroot

actiontext/package.json

@@ -31,6 +31,7 @@
     "@rollup/plugin-commonjs": "^19.0.1",
     "@rollup/plugin-node-resolve": "^11.0.1",
     "rollup": "^2.35.1",
+    "rollup-plugin-terser": "^7.0.2",
     "trix": "^2.0.0"
   },
   "scripts": {