* Updated to latest aws-crt-ffi, updated EventLoopGroup/options init
* Removed test-ci target, just use test for everything now
* Added event_loop_group API to CRT/stubs
* Removed headers (all generated) from format-check
* Added the ability to force extension vs FFI
* make test will now trigger composer run test/phpunit, and force tests with both FFI and extension
* Updated builder version, removed redundant php7 test run
* Removed type annotations that anger php5, limited backends on php5
* mv src -> ext, lib -> src to be more in line with PHP module expectations
* Fixed dependency for ffi test
* Fixed path in format-check to C source
* CRT will now try the extension first, then FFI
* Added test-ffi target, use it in CI
* Added clang-format config, fixed RETURN_STRING API mismatch
* Skip installing php and packages on the PHP docker images
* Removed al2 job that was never going to work, and compiler tests
* Fixed basic test for extension loading
* Cleaned up lib structure, fixed tests
* use test-ci target to conditionally test in GitHub
* Use v0.8.1 of builder
* Added composer config, added IO/error tests using phpunit
* Added ApiGen doc comments
* Added test to ensure last_error is not set from loading up the CRT
Justin Boswell
SamRemis