Changes for Crypt-JWT distribution

0.021   2018/03/15
        - fix #13 off-by-one in exp verification

0.020   2018/02/02
        - improved diagnostics

0.019   2018/01/26
        - fix #11 kid keys
        - fix #9  Support for Java lib that pads base64 encoding 

0.018   2016/08/31
        - doc fixes
        - file perms fixes

0.017   2016/06/03
        - doc fixes

0.016   2016/05/12
        - require CryptX-0.034 (jws_no_key.t fails with older versions)

0.015   2016/05/12
        - fix broken test jws_no_key.t

0.014   2016/05/04
        - using Base64 en/decoding routines from CryptX also in tests

0.013   2016/05/03
        - fix misused utf8:stuff
        - fix 5.8.* compatibility
        - using Base64 en/decoding routines from CryptX

0.012   2016/05/02
        - JWS is now able to use the key from jwk header
        - added support for Flattened JSON serialization (for both JWS and JWE)

0.011   2015/10/22
        - switch to JSON::MaybeXS https://github.com/DCIT/perl-Crypt-JWT/pull/1

0.010   2015/07/07
        - INCOMPATIBLE CHANGE: 'key' param of decode_jwt and encode_jwt:
          PEM/DER/JWK-JSON key strings are not passed as scalars but
          as a reference to scalar (see examples in documentation)
        - decode_jwt: kid_keys now strictly checks kty (key type)

0.009   2015/07/04
        - decode_jwt: verify_iat default changed to 0
        - encode_jwt: auto_typ removed
        - improved tests

0.008   2015/07/04
        - decode_jwt: new parameter - ignore_claims
        - fix related to nbf, iat, exp checks

0.007   2015/07/04
        - decode_jwt: new parameter - kid_keys

0.006   2015/07/03
        - after many changes first candidate for stable API
        - incomplete tests

0.001   2015/06/30
        - initial version