Bump halo2curves to 0.7 (#366) #1234

Job	Run time
Run the examples	1m 34s
Build target wasm32-unknown-unknown	2m 24s
Build target wasm32-wasi	2m 23s
Bitrot check	1m 23s
Intra-doc links	57s
Test on ubuntu-latest with basic features	3m 56s
Rustfmt	15s
Test on windows-latest with basic features	9m 46s
Test on macOS-latest with basic features	3m 28s
Test on ubuntu-latest with all features	4m 22s
Test on windows-latest with all features	9m 34s
Test on macOS-latest with all features	4m 16s
	44m 18s

Provide feedback