bump version to 0.4.5 #1437

Job	Run time
ERC20 processor build only	2m 56s
Fmt and clippy	51s
Build and cache all tests (release-fast)	2m 12s
Payment lib unit test run	1m 43s
Build and cache all tests (release-lto)	3m 15s
Payment tests (basic + multi)	2m 52s
Build and cache all tests (dev)	1m 14s
Payment tests (errors)	3m 41s
Payment tests (custom)	4m 1s
Payment tests (multi)	4m 11s
Payment tests (rpc pool)	2m 11s
Test Holesky faucet	5m 47s
	34m 54s

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