- Convert to singlespec
- Update to version 0+git.20200512:
* Add support for CLANG_ENABLE_OBJC_WEAK
* Prevent propogation to configurations of nested 'dependent-settings' directives
* Add .tbd to the .xcodeproj generator’s extension map
* fix encoding issues with inputs for better Python 3 support
* fix make output checks under C locale
* Fix Python 3 incompatibilities
* Add missing b'' qualifier from da63cb0f.
* Misc python3 fixes in xcode_emulation.
* Fix incorrect depfile path relativization
* Add flake8 checks to travis configuration.
* Changes for windows and easy xml to get gyp to run under python 3.
* More miscellaneous fixes for Python3 compatibility.
* src,win: add VS2019 version
* Fixes needed for Python3 on Win32.
* Fix one dangling utf8 decode call needed for python 3.
* Mostly mechanical changes for Python3 support.
* Update simple_copy.py for Python3 types.
* Use ast module instead of compiler module for parsing files.
* Make Visual Studio 2017 Community Edition work w/ GYP.
* Add a copyright header to TestCmd.py.
* Fix issue with missing resources in Xcode ui tests targets.
* Patch GYP so that building with Xcode 10 works.
* infra: remove cq.cfg, which is no longer used.
* Make Travis build only the master branch
* Disable some tests that fail on bots to try to get a green build
* and try clang
* readd osx
* try a wrapper script