2.0.1

This release fixes constraint incompatibilities with PHP 7.1.0, newer PHP 7.1.11 UConverter API
and a type error raised when attempting to fetch the AST nodes of an interface's method.

Total issues resolved: 5

• 372: Added missing parent::setUp() in tests thanks to @kukulich
• 376: Incorrect PHP version constraint thanks to @nikic
• 377: composer: allow PHP 7.1 thanks to @TomasVotruba
• 379: Return empty ast for interface method body thanks to @codeliner
• 380: #379 UConverter#getAliases($name) is not an optional parameter anymore as per latest PHP releases thanks to @Ocramius