* Node modules compatibility: add ".js" extension to imported polyfills
* Update fixtures
* add extensions on calling `addDefaultImport()`, not in the function.
* Lazy load tagged template literal strings
* Update snapshots to reflect lazy loading
* Use pure annotation and remove unnecessary parenthesized expression
* Update snapshots
* Optimize lazy loading by doing assignment within logical expression
* Update snapshots to reflect optimization
* Use re-define function pattern to avoid hitting function size deopts
* Update snapshots to reflect the usage of the redefining function pattern
