Apply gcc-10 bugfix to lexbor

Fixes: #8
3 jobs for bugfix/gcc-10 in 8 minutes and 11 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Test
passed #144721
dialyzer

00:08:10

passed #144719
lint

00:01:34

passed #144720
unit-testing

00:01:37

84.0%