Add support for reading/writing `.xlsx` files #27

Job	Run time
Build extension binaries / Generate matrix	4s
Build extension binaries / Windows (windows_amd64, x64-windows-static-md)	22m 35s
Build extension binaries / Linux (linux_amd64, ubuntu:18.04, x64-linux)	4m 54s
Build extension binaries / MacOS (osx_amd64, x86_64, x64-osx)	2m 45s
Build extension binaries / Windows (windows_amd64_rtools, x64-mingw-static)	45m 11s
Build extension binaries / DuckDB-Wasm (wasm_mvp, wasm32-emscripten)	4m 15s
Build extension binaries / Linux (linux_amd64_gcc4, quay.io/pypa/manylinux2014_x86_64, x64-linux)	4m 2s
Build extension binaries / MacOS (osx_arm64, arm64, arm64-osx)	3m 0s
Build extension binaries / DuckDB-Wasm (wasm_eh, wasm32-emscripten)	4m 18s
Build extension binaries / Linux (linux_arm64, ubuntu:18.04, arm64-linux)	4m 56s
Build extension binaries / DuckDB-Wasm (wasm_threads, wasm32-emscripten)	3m 45s
Deploy extension binaries / Generate matrix	3s
Deploy extension binaries / Deploy (linux_amd64)	30s
Deploy extension binaries / Deploy (linux_amd64_gcc4)	34s
Deploy extension binaries / Deploy (linux_arm64)	30s
Deploy extension binaries / Deploy (osx_amd64)	30s
Deploy extension binaries / Deploy (osx_arm64)	31s
Deploy extension binaries / Deploy (windows_amd64)	41s
Deploy extension binaries / Deploy (windows_amd64_rtools)	33s
Deploy extension binaries / Deploy (wasm_mvp)	31s
Deploy extension binaries / Deploy (wasm_eh)	34s
Deploy extension binaries / Deploy (wasm_threads)	30s
	1h 45m 12s

Provide feedback