v1.1.0

• Feature: Forward compatibility with stable EventLoop 1.0 and 0.5.
  (#11 by @clue)

• Improve documentation and add API docs (docblocks).
  (#10 and #12 by @clue)

• Improve test suite and add .gitattributes to exclude dev files from export.
  Update to PHPUnit 9 and simplify test setup.
  (#8, #9, #17 and #18 by @clue and #15 by @SimonFrings)