remove es20xx prefixes from plugins and rename folders (#6575)

packages/babel-plugin-transform-modules-commonjs/test/fixtures/source-map/exec.js

@@ -0,0 +1,36 @@
+var tests = [
+  'import "foo";',
+  'import foo from "foo";',
+  'import {default as foo2} from "foo";',
+  'import * as foo from "foo";',
+  'import {bar} from "foo";',
+  'import {bar2, baz} from "foo";',
+  'import {bar as baz2} from "foo";',
+  'import {bar as baz3, xyz} from "foo";',
+  'import bar, * as bar2 from "foo";',
+  'import bar, {bar2, bar3 as bar4} from "foo";',
+
+  'export var a;',
+  'export default function(){};',
+  'export default function f(){};',
+  'export default 42;',
+  'export {foo}; var foo;',
+  'export { foo as default }; var foo;',
+  'export * from "foo";',
+  'export {foo} from "foo";',
+  'export {default as foo} from "foo";',
+];
+
+tests.forEach(function (code) {
+  var res = transform(code, {
+    sourceMap: true,
+    plugins: opts.plugins
+  });
+
+  // Should create mapping
+  assert.notEqual(
+    res.map.mappings,
+    '',
+    'expected to generate sourcemap for: ' + code
+  );
+});