Bumped version to 0.8.0 (#448) #2078

Job	Run time
debian:12 (Latest Mapnik) (CMake) (GNU)	3m 53s
ubuntu:24.04 (Latest Mapnik) (CMake) (GNU)	4m 16s
debian:11 (CMake) (GNU)	3m 40s
macos-12 (CMake) (LLVM)	10m 52s
debian:12 (CMake) (GNU)	3m 23s
freebsd13 (CMake) (LLVM)	8m 32s
macos-13 (CMake) (LLVM)	14m 35s
fedora:39 (CMake) (GNU)	3m 58s
freebsd14 (CMake) (LLVM)	7m 36s
macos-14 (Autotools) (LLVM)	11m 2s
fedora:40 (CMake) (GNU)	4m 17s
opensuse/leap:15 (CMake) (GNU)	6m 57s
macos-14 (CMake) (LLVM)	10m 49s
quay.io/centos/centos:stream9 (CMake) (GNU)	6m 14s
ubuntu:22.04 (CMake) (GNU)	3m 26s
debian:unstable (CMake) (GNU)	3m 10s
fedora:rawhide (CMake) (GNU)	3m 42s
ubuntu:devel (CMake) (GNU)	3m 18s
ubuntu:24.04 (Autotools) (GNU)	2m 24s
ubuntu:24.04 (Autotools) (LLVM)	2m 40s
ubuntu:24.04 (CMake) (GNU)	3m 39s
ubuntu:24.04 (CMake) (LLVM)	3m 13s
	2h 5m 36s

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