Allow setting geometry type explicitly during layer creation, + misc Bugfixes #62

Job	Run time
Build extension binaries / Generate matrix	23s
Build extension binaries / Windows (windows_amd64, x64-windows-static-md)	51m 9s
Build extension binaries / DuckDB-Wasm (wasm_mvp, wasm32-emscripten)	37m 10s
Build extension binaries / MacOS (osx_amd64, x86_64, x64-osx)	53m 13s
Build extension binaries / Linux (linux_amd64, ubuntu:18.04, x64-linux)	27m 19s
Build extension binaries / MacOS (osx_arm64, arm64, arm64-osx)	32m 40s
Build extension binaries / DuckDB-Wasm (wasm_eh, wasm32-emscripten)	37m 22s
Build extension binaries / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	14m 10s
Build extension binaries / DuckDB-Wasm (wasm_threads, wasm32-emscripten)	37m 57s
Build extension binaries / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	32m 39s
Deploy extension binaries / Generate matrix	25s
Deploy extension binaries / Deploy (linux_amd64)	31s
Deploy extension binaries / Deploy (linux_amd64_gcc4)	30s
Deploy extension binaries / Deploy (linux_arm64)	31s
Deploy extension binaries / Deploy (osx_amd64)	32s
Deploy extension binaries / Deploy (osx_arm64)	39s
Deploy extension binaries / Deploy (windows_amd64)	31s
Deploy extension binaries / Deploy (wasm_mvp)	1m 26s
Deploy extension binaries / Deploy (wasm_eh)	1m 27s
Deploy extension binaries / Deploy (wasm_threads)	1m 24s
	5h 31m 58s

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