regex: Support `\S` (#3817) #15790

Job	Run time
Build on old Debian ${{ matrix.container }}	0s
Build on CentOS 7	0s
Build on gcc 11 ASAN	0s
Create source tarball	0s
changes	5s
Build static	0s
Run debug tests on Ubuntu 20.04	0s
Test source tarball	0s
Build rizin rzpipe	0s
Build rz-bindgen	0s
linux-meson-clang-tests	28m 1s
linux-meson-gcc-tests	24m 53s
macos-meson-clang-tests	16m 45s
linux-gcc-tests-asan	1h 17m 0s
linux-clang-tests-asan	1h 7m 41s
linux-gcc-tests-codecov	40m 23s
capstone-v3	4m 43s
capstone-v4	6m 13s
capstone-sys	4m 25s
no-gpl-code	4m 56s
Publish Docker image on Docker Hub	1h 53m 35s
Test EXTRA_PREFIX works well	0s
Build OSX package	0s
Include Rizin headers from C++ program	0s
Build Android ${{ matrix.name }} package	0s
Build Windows zip/installer ${{ matrix.name }}	0s
Test OSX pkg	0s
Test Windows installer built with ${{ matrix.name }}	0s
Create draft release and upload artifacts	0s
	6h 28m 40s

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