Update base64 requirement from 0.21 to 0.22 #763

Job	Run time
clippy	42s
MSRV (1.70.0, cucumber-codegen, ubuntu)	1m 22s
MSRV (1.70.0, cucumber-codegen, macOS)	2m 1s
MSRV (1.70.0, cucumber-codegen, windows)	2m 14s
feature (<none>)	35s
MSRV (1.70.0, cucumber, ubuntu)	3m 43s
feature (macros)	41s
rustfmt	15s
MSRV (1.70.0, cucumber, macOS)	4m 8s
feature (timestamps)	38s
MSRV (1.70.0, cucumber, windows)	4m 40s
feature (output-json)	38s
feature (output-junit)	43s
rustdoc (cucumber-codegen)	25s
feature (libtest)	34s
rustdoc (cucumber)	58s
feature (tracing)	37s
test (cucumber-codegen, stable, ubuntu)	54s
test (cucumber-codegen, stable, macOS)	1m 19s
test (cucumber-codegen, stable, windows)	2m 12s
test (cucumber-codegen, beta, ubuntu)	57s
test (Book, ubuntu)	5m 22s
test (cucumber-codegen, beta, macOS)	1m 21s
test (Book, macOS)	6m 24s
test (cucumber-codegen, beta, windows)	1m 57s
test (Book, windows)	7m 38s
test (cucumber-codegen, nightly, ubuntu)	1m 34s
test (cucumber-codegen, nightly, macOS)	4m 46s
test (cucumber-codegen, nightly, windows)	3m 12s
test (cucumber, stable, ubuntu)	3m 10s
test (cucumber, stable, macOS)	3m 19s
test (cucumber, stable, windows)	5m 6s
test (cucumber, beta, ubuntu)	3m 2s
test (cucumber, beta, macOS)	3m 48s
test (cucumber, beta, windows)	4m 43s
test (cucumber, nightly, ubuntu)	3m 38s
test (cucumber, nightly, macOS)	4m 55s
test (cucumber, nightly, windows)	5m 27s
deploy (Book)	0s
pr	1s
release (GitHub)	0s
publish (crates.io)	0s
	1h 39m 39s

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