refactor: Wrap ffi call > pactffi_with_multipart_file_v2

[tienvx]

This is the first PR for wrapping ffi calls.

Currently, $this->ffi->call() and $this->ffi->get() accept arguments of any type, and return mixed value. There is no type safe. And static code analyzer (phpstan) will complain if we increase the level.

This PR replace calling $this->ffi->call('pactffi_with_multipart_file_v2') directly by creating a new method withMultipartFileV2 which receive expected arguments and return expected value.

[coveralls]

Pull Request Test Coverage Report for Build 11027868201

Details

• 24 of 29 (82.76%) changed or added relevant lines in 3 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.1%) to 97.199%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/PhpPact/FFI/Client.php	17	22	77.27%
<!--	Total:	24	29	82.76%	-->

Totals
Change from base Build 11025479316:	-0.1%
Covered Lines:	2325
Relevant Lines:	2392

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💛 - Coveralls