Bump ffi from 1.9.18 to 1.13.1

[dependabot[bot]]

Bumps ffi from 1.9.18 to 1.13.1.

Changelog

Sourced from ffi's changelog.

1.13.1 / 2020-06-09

Changed:

• Revert use of ucrtbase.dll as default C library on Windows-MINGW. ucrtbase.dll is still used on MSWIN target. #790
• Test for ffi_prep_closure_loc() to make sure we can use this function. This fixes incorrect use of system libffi on MacOS Mojave (10.14). #787
• Update types.conf on x86_64-dragonflybsd

1.13.0 / 2020-06-01

Added:

• Add TruffleRuby support. Almost all specs are running on TruffleRuby and succeed. #768
• Add ruby source files to the java gem. This allows to ship the Ruby library code per platform java gem and add it as a default gem to JRuby. #763
• Add FFI::Platform::LONG_DOUBLE_SIZE
• Add bounds checks for writing to an inline char[] . #756
• Add long double as callback return value. #771
• Update type definitions and add types from stdint.h and stddef.h on i386-windows, x86_64-windows, x86_64-darwin, x86_64-linux, arm-linux, powerpc-linux. #749
• Add new type definitions for powerpc-openbsd and sparcv9-openbsd. #775, #778

Changed:

• Raise required ruby version to >= 2.3.
• Lots of cleanups and improvements in library, specs and benchmarks.
• Fix a lot of compiler warnings at the C-extension
• Fix several install issues on MacOS:
  • Look for libffi in SDK paths, since recent versions of macOS removed it from /usr/include . #757
  • Fix error ld: library not found for -lgcc_s.10.4
  • Don't built for i386 architecture as it is deprecated
• Several fixes for MSVC build on Windows. #779
• Use ucrtbase.dll as default C library on Windows instead of old msvcrt.dll. #779
• Update builtin libffi to fix a Powerpc issue with parameters of type long
• Allow unmodified sourcing of (the ruby code of) this gem in JRuby and TruffleRuby as a default gem. #747
• Improve check to detect if a module has a #find_type method suitable for FFI. This fixes compatibility with stdlib mkmf . #776

Removed:

• Reject callback with :string return type at definition, because it didn't work so far and is not save to use. #751, #782

1.12.2 / 2020-02-01

• Fix possible segfault at FFI::Struct#[] and []= after GC.compact . #742

1.12.1 / 2020-01-14

... (truncated)

Commits

• 4b053c8 Update CHANGELOG for 1.13.1
• a03ffb6 Bump VERSION to 1.13.1
• 18370af Merge pull request #790 from larskanis/msvcrt-on-mingw#
• f2d35a9 Add a spec regarding issue #788
• 90f4fca Revert usage of libc's time() on MINGW
• cc32fd0 Remove unused strcat() mapping in specs
• f259139 Revert to msvcrt.dll as LIBC on MINGW
• 81dad3c Merge pull request #787 from larskanis/ffi_prep_closure_loc
• 2c3979e Merge pull request #789 from ahorek/dragon
• c9b01d7 Update types.conf on x86_64-dragonflybsd
• Additional commits viewable in compare view

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