gplugin/gplugin

Set warning level instead of adding Wextra explicitly

2021-10-07, Elliott Sales de Andrade
c24d77cbf268
Set warning level instead of adding Wextra explicitly

Meson warns about the latter, since the warning level covers it.
[branchname]
master = default
develop = develop
feature = feature/
release = release/
hotfix = hotfix/
support = support/