Tests

Merge pull request #194 from LLFourn/pair_secret_share_new_unchecked #821

Job	Run time
Rustfmt	13s
build	1m 16s
doc-build	32s
clippy_check	38s
test (x86_64-unknown-linux-gnu)	4m 1s
test-minimal (secp256kfun)	1m 7s
test (armv7-unknown-linux-gnueabihf)	7m 1s
test-nightly	1m 35s
test-alloc (secp256kfun)	1m 10s
test-minimal (sigma_fun)	2m 49s
test-minimal (ecdsa_fun)	47s
test-alloc (sigma_fun)	2m 48s
test-alloc (ecdsa_fun)	50s
test-minimal (schnorr_fun)	59s
test-alloc (schnorr_fun)	1m 9s
	26m 55s

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