Feature: Simplify usage by supporting new default loop. (#60 by @clue)

// old (still supported)
Clue\React\Block\await($promise, $loop);
Clue\React\Block\awaitAny($promises, $loop);
Clue\React\Block\awaitAll($promises, $loop);

// new (using default loop)
Clue\React\Block\await($promise);
Clue\React\Block\awaitAny($promises);
Clue\React\Block\awaitAll($promises);

Feature: Added support for upcoming react/promise v3. (#61 by @davidcole1340 and @SimonFrings)

Improve error reporting by appending previous message for Throwables. (#57 by @clue)

Deprecate $timeout argument for await*() functions. (#59 by @clue)

// deprecated
Clue\React\Block\await($promise, $loop, $timeout);
Clue\React\Block\awaitAny($promises, $loop, $timeout);
Clue\React\Block\awaitAll($promises, $loop, $timeout);

// still supported
Clue\React\Block\await($promise, $loop);
Clue\React\Block\awaitAny($promises, $loop);
Clue\React\Block\awaitAll($promises, $loop);

Improve API documentation. (#58 and #63 by @clue and #55 by @PaulRotmann)

Improve test suite and use GitHub actions for continuous integration (CI). (#54 by @SimonFrings)