Add CJS

Author: schmidt-sebastian

packages/firestore/rollup.config.browser.js

@@ -35,5 +35,11 @@ export default [
     output: { file: pkg.browser, format: 'es', sourcemap: true },
     plugins: util.es2017ToES5Plugins(/* mangled= */ true),
     external: util.resolveBrowserExterns
+  },
+  {
+    input: pkg.esm2017,
+    output: { file: pkg.module, format: 'cjs', sourcemap: true },
+    plugins: util.es2017ToES5Plugins(/* mangled= */ true),
+    external: util.resolveBrowserExterns
   }
 ];

packages/firestore/rollup.config.browser.memory.js

@@ -34,11 +34,21 @@ export default [
   {
     input: path.resolve('./memory', memoryPkg['esm2017']),
     output: {
-      file: path.resolve('./memory', memoryPkg.module),
+      file: path.resolve('./memory', memoryPkg.browser),
       format: 'es',
       sourcemap: true
     },
     plugins: util.es2017ToES5Plugins(/* mangled= */ true),
     external: util.resolveBrowserExterns
+  },
+  {
+    input: path.resolve('./memory', memoryPkg['esm2017']),
+    output: {
+      file: path.resolve('./memory', memoryPkg.module),
+      format: 'cjs',
+      sourcemap: true
+    },
+    plugins: util.es2017ToES5Plugins(/* mangled= */ true),
+    external: util.resolveBrowserExterns
   }
 ];