Bump to version 0.49.0 (Round 1) #1426

Job	Run time
check_clippy	3m 19s
check_docs	2m 54s
check_msrv	28s
build_all_features	4m 31s
build_all_platforms (ubuntu-latest)	2m 33s
build_default_features (ubuntu-latest)	39s
build_all_platforms (macos-latest)	1m 54s
build_under_wasm	52s
build_default_features (macos-latest)	43s
build_all_platforms (windows-latest)	4m 25s
build_default_features (windows-latest)	1m 22s
unit	6m 25s
	30m 5s

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