tests

Add encode_lazy method to CodecContext #979

Job	Run time
package-source	17s
py-3.8 lib-6.0 ubuntu-latest	4m 59s
style	14s
py-3.8 lib-5.1 ubuntu-latest	4m 22s
py-3.8 lib-6.0 windows-latest	3m 18s
py-3.8 lib-5.0 ubuntu-latest	3m 58s
py-3.8 lib-5.1 windows-latest	2m 42s
py-pypy3.9 lib-5.0 ubuntu-latest	4m 15s
py-3.8 lib-5.0 windows-latest	2m 53s
package-wheel (macos-latest, arm64)	14m 47s
py-3.8 lib-5.0 macos-latest	9m 5s
package-wheel (macos-latest, x86_64)	44m 12s
package-wheel (ubuntu-latest, aarch64)	3h 20m 53s
package-wheel (ubuntu-latest, i686)	21m 46s
package-wheel (ubuntu-latest, x86_64)	20m 9s
package-wheel (windows-latest, AMD64)	16m 41s
publish	48s
	5h 55m 19s

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