Replace "git" scheme with "https" in jsx URI.
Update deps alignment.
Add dependency: meck.
Test string generation error in oauth1_credentials module.
Wrap crypto module in a mockable, local module.

See: eproxus/meck#59
Test oauth1_random_string module.
Test low_entropy error in oauth1_verifier module.
Remove stale TODO note.
Test oauth1_resource module.