v0.14.0-M1

This release introduces Scala 2.13 support.

Dependency updates:

Dependency	Version
cats	2.0.0-M4
cats-effect	2.0.0-M4
fs2	1.1.0-M1
http4s	0.21.0-M2
jsoniter	0.52.2
log4cats	0.4.0-M2