rename opening_key to verification_key (#285) #382

Job	Run time
Build - x86_64-apple-darwin	1m 21s
Build - aarch64-apple-darwin	1m 12s
Build - x86_64-unknown-linux-gnu	1m 23s
Build - aarch64-unknown-linux-gnu	1m 18s
Build - x86_64-pc-windows-msvc	15m 10s
Build - aarch64-pc-windows-msvc	15m 37s
Test - x86_64-apple-darwin - node@20	1m 7s
Test - aarch64-apple-darwin - node@20	38s
Test - x86_64-unknown-linux-gnu - node@20	39s
Test - aarch64-unknown-linux-gnu - node@20	4m 16s
Test - x86_64-pc-windows-msvc - node@20	1m 41s
Test - aarch64-pc-windows-msvc - node@20	31s
Publish	20s
	45m 13s

Provide feedback