Antoine GIRARD 274149dd14 Switch to keybase go-crypto (for some elliptic curve key) + test ()
* Switch to keybase go-crypto (for some elliptic curve key) + test

* Use assert.NoError 

and add a little more context to failing test description

* Use assert.(No)Error everywhere 🌈

and assert.Error in place of .Nil/.NotNil
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cast5.go Switch to keybase go-crypto (for some elliptic curve key) + test ()