Add missing #include <algorithm> in microfmt.hpp #1870

Job	Run time
test-linux (gcc, --shared)	1m 8s
test-macos (gcc, --shared)	1m 34s
test-linux (gcc)	1m 6s
test-macos (gcc)	50s
test-linux (clang, --shared)	1m 1s
test-macos (clang, --shared)	47s
test-windows (msvc, --shared)	2m 13s
test-linux (clang)	1m 5s
test-windows (msvc)	1m 34s
test-macos (clang)	56s
test-windows (clang, --shared)	1m 51s
unittest-linux	29m 56s
test-windows (clang)	1m 41s
unittest-linux-bazel	6m 39s
unittest-macos	5m 8s
test-windows (gcc, --shared)	2m 21s
test-windows (gcc)	2m 28s
unittest-windows (cl, OFF, Debug)	1m 31s
unittest-windows (cl, OFF, RelWithDebInfo)	2m 6s
unittest-windows (clang++, OFF, Debug)	1m 57s
unittest-windows (clang++, OFF, RelWithDebInfo)	2m 8s
test-linux-all-configurations (gcc, --shared)	3m 10s
test-linux-all-configurations (gcc)	4m 4s
test-linux-all-configurations (clang, --shared)	3m 18s
test-linux-all-configurations (clang)	3m 14s
test-macos-all-configurations (gcc, --shared)	2m 49s
test-macos-all-configurations (gcc)	3m 16s
test-macos-all-configurations (clang, --shared)	1m 42s
test-macos-all-configurations (clang)	1m 48s
test-windows-all-configurations (msvc, --shared)	2m 54s
test-windows-all-configurations (msvc)	2m 51s
test-windows-all-configurations (clang, --shared)	3m 13s
test-windows-all-configurations (clang)	3m 6s
test-windows-all-configurations (gcc, --shared)	5m 5s
test-windows-all-configurations (gcc)	5m 21s
	1h 55m 51s

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