wrench: Switched to one rollup config file

packages/plugin-theme/rollup.js

@@ -0,0 +1,27 @@
+import { terser } from "rollup-plugin-terser";
+import babel from "rollup-plugin-babel";
+import resolve from "rollup-plugin-node-resolve";
+import json from "rollup-plugin-json";
+import meta from "./package.json";
+
+export default {
+  input: "src/index.js",
+  plugins: [
+    resolve({
+      browser: true
+    }),
+    json(),
+    babel({
+      exclude: "node_modules/**"
+    })
+    //terser({
+    //  output: {
+    //    preamble: `/**\n * ${meta.name} | v${meta.version}\n * ${
+    //      meta.description
+    //    }\n * (c) ${new Date().getFullYear()} ${meta.author}\n * @license ${
+    //      meta.license
+    //    }\n */`
+    //  }
+    //})
+  ]
+};