1.2.0

What's Changed

• Feature/refactor makefile by @Toasterbirb in #4
• Use CXXFLAGS instead of CXX_FLAGS by @Toasterbirb in #5
• Implement developer mode by @Toasterbirb in #6
• Use git checkout when switching to dev branch by @Toasterbirb in #7
• Revert "Use git checkout when switching to dev branch" by @Toasterbirb in #8
• Use git checkout when switching to dev branch by @Toasterbirb in #9
• Release 1.2.0 by @Toasterbirb in #10

Full Changelog: 1.1.0...1.2.0