fix strict schema matching

[andreineculau]

A schema with "$schema": "http://json-schema.org/draft-06/schema" i.e. no trailing # will make jesse believe this is not a draft6 schema, and complain about unsupported schema.

http://json-schema.org/draft-06/schema# is equivalent to http://json-schema.org/draft-06/schema and should be treated as such.

[tsloughter]

Just came here to say the same thing.

I plan to send a PR to parse the schema url and match the parts, but curious if this really needs to continue to support OTP-19 and 20? Would like to just use uri_string from the stdlib.