feat: add serialize method on Transaction type #290

Job	Run time
Build and test macOS arm64 wheels (3.8)	3m 58s
Build and test macOS x86_64 wheels (3.8)	3m 40s
Build and test macOS arm64 wheels (3.9)	4m 57s
Build and test Manylinux 2014 x86_64 wheels (cp38-cp38)	3m 19s
Build and test macOS x86_64 wheels (3.9)	4m 28s
Build and test macOS arm64 wheels (3.10)	3m 44s
Build and test Manylinux 2014 x86_64 wheels (cp39-cp39)	3m 44s
Build and test macOS x86_64 wheels (3.10)	4m 14s
Build and test Windows wheels (3.8)	6m 40s
Build and test macOS arm64 wheels (3.11)	3m 43s
Build and test Manylinux 2014 x86_64 wheels (cp310-cp310)	3m 21s
Build and test macOS x86_64 wheels (3.11)	3m 35s
Build and test Windows wheels (3.9)	5m 38s
Build and test macOS arm64 wheels (3.12)	3m 53s
Build and test Manylinux 2014 x86_64 wheels (cp311-cp311)	3m 19s
Build and test macOS x86_64 wheels (3.12)	4m 5s
Build and test Windows wheels (3.10)	4m 56s
Build and test Manylinux 2014 x86_64 wheels (cp312-cp312)	3m 14s
Build and test Windows wheels (3.11)	5m 36s
Build and test Windows wheels (3.12)	5m 3s
	1h 25m 7s

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