Update base64 requirement from 0.21 to 0.22 #760

Job	Run time
clippy	38s
MSRV (1.70.0, cucumber-codegen, ubuntu)	1m 19s
feature (<none>)	41s
MSRV (1.70.0, cucumber-codegen, macOS)	2m 56s
rustdoc (cucumber-codegen)	25s
feature (macros)	49s
MSRV (1.70.0, cucumber-codegen, windows)	2m 7s
rustdoc (cucumber)	53s
feature (timestamps)	42s
rustfmt	13s
MSRV (1.70.0, cucumber, ubuntu)	3m 31s
feature (output-json)	36s
MSRV (1.70.0, cucumber, macOS)	3m 58s
feature (output-junit)	35s
MSRV (1.70.0, cucumber, windows)	4m 38s
feature (libtest)	34s
feature (tracing)	45s
test (cucumber-codegen, stable, ubuntu)	55s
test (cucumber-codegen, stable, macOS)	1m 12s
test (Book, ubuntu)	5m 35s
test (cucumber-codegen, stable, windows)	2m 6s
test (Book, macOS)	4m 23s
test (Book, windows)	7m 10s
test (cucumber-codegen, beta, ubuntu)	58s
test (cucumber-codegen, beta, macOS)	1m 36s
test (cucumber-codegen, beta, windows)	2m 9s
test (cucumber-codegen, nightly, ubuntu)	1m 34s
test (cucumber-codegen, nightly, macOS)	2m 46s
test (cucumber-codegen, nightly, windows)	2m 38s
test (cucumber, stable, ubuntu)	3m 2s
test (cucumber, stable, macOS)	5m 9s
test (cucumber, stable, windows)	4m 47s
test (cucumber, beta, ubuntu)	3m 6s
test (cucumber, beta, macOS)	3m 37s
test (cucumber, beta, windows)	4m 21s
test (cucumber, nightly, ubuntu)	3m 42s
test (cucumber, nightly, macOS)	4m 17s
test (cucumber, nightly, windows)	5m 42s
deploy (Book)	1s
pr	1s
release (GitHub)	1s
publish (crates.io)	1s
	1h 36m 9s

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