Package import errors with Go 1.14

[atombender]

Just thought you should know; maybe put a warning in the readme? With Go 1.14, I get this:

$ go version
go version go1.14.6 darwin/amd64

$ typex .
2020/10/15 11:03:03 internal error: package "sync" without types was imported from "[...]"

Go 1.15 works fine.

[dtgorski]

Unfortunately I lack the hardware to reproduce and fix the behaviour, so I follow your suggestion to add this information to the README file. I updated a "Know Issues" section accordingly. Thank you.