3.0.0 Beta 9

• Fixed circular reference in async() on exceptions (#394)
• Removed deprecated combinator functions:
  • Amp\Future\race → Amp\Future\awaitFirst
  • Amp\Future\any → Amp\Future\awaitAny
  • Amp\Future\some → Amp\Future\awaitAnyN
  • Amp\Future\settle → Amp\Future\awaitAll
  • Amp\Future\all → Amp\Future\await