Add removeprefix and removesuffix to pystring.
Python 3.9 added removeprefix and removesuffix
methods to Pythons string class. Add them to
pystring to match the interfaces.

It's Makefile convention to be able to install to `DESTDIR`. This is especially important for packaging on Linux distributions but might be convenient for other users as well. Also this introduces `PREFIX`, another convention.

Add removeprefix and removesuffix to pystring

Added option to build static lib and installing header using cmake

cmake: fix build with cmake 4.0.0

Proper installation paths

…latest versions of windows/mac/ubuntu (#48)

* simplified github actions to include just 8 tasks, 4 linux, 2 macos, 2 windows, always on the latest version of the os/runners that github gives us

* using specific sha when pointing to the actions/checkout repo instead of a tag, a tag can be moved around, but a sha can't so it's more stable

* Add meson build system

* Sync cmake's installation layout to Makefile and Meson builds

* meson: remove cmake config target generation

this pulls in an extra dependency on the cmake binary,
CMake users can use the PkgConfig module instead.

* ci: add meson tests

* build: default to c++17

* ci: fix cmake builds

* tests: fix memory leak in tests

* ci: workaround clang sanitizer linking bug

* build: install headers into a subdir

Use `-DCMAKE_INSTALL_PREFIX=...` to set a non-local install
destination.

Signed-off-by: Larry Gritz <lg@larrygritz.com>

* new header only build option

* removed extra semi colon

* remaing marcos in new header file with a PYSTRING prefix so that they don't clash with other definitions when used in different contexts

* tightening compatbility with python's behavior in edge cases

* a couple of more edge cases