2.0.0

Release 2.0.0 of variant lite adds support for multiple identical types for C++11 and later. Thanks to @AnthonyVH.

It contains the following changes:

Additions:

• Add support for identical types for C++11 and later (fixes #40) (#41, thanks to @AnthonyVH)
• Add tweak header support.

Changes:

• Add .editorconfig
• Add TortoiseGit integration with GitHub issues
• Add IDE folders/files and build folder to .gitignore (.vs, .vscode, CodeBlocks)
• Add badge 'on godbolt', nonstd-lite-project issue 36.
• Change 'on conan' link to refer to conan center (thanks @flexferrum).
• Prevent unused variable in get<>() (#37, thanks @mattyclarkson).
• Improve MSVC version table, nonstd-lite-project issue 38.
• Change requires() to use a default template argument, nonstd-lite-project 40.

Fixes:

• Fix visitor to be able to return a reference (issue #39, thanks @ligfx)