fix(@angular-devkit/schematics): Export 'rename' rule

- Export the 'rename' rule.
  - The other rules in this directory are exported, so I assumed this one should
    be exported as well.

Author: Brent Schmidt

packages/angular_devkit/schematics/src/index.ts

@@ -23,6 +23,7 @@ export * from './rules/base';
 export * from './rules/call';
 export * from './rules/move';
 export * from './rules/random';
+export * from './rules/rename';
 export * from './rules/schematic';
 export * from './rules/template';
 export * from './rules/url';