JWT Firebase idToken validation

[alextekartik]

Thanks for your work that I have used to parse firebase rsa public key.

I had to add the following overriden dependencies to work with the latest rsa_pkcs that fixes the issue (https://github.com/amaurel/rsa_pkcs/issues/8) that could allow jwt firebase validation

  rsa_pkcs: '>=1.1.2'
  asn1lib: '>=0.6.4'

I can do a pull request if you want

[pulyaevskiy]

I published 0.2.2 with upgraded dependencies. Thanks for reporting!

[alextekartik]

Thanks!