[Bug] Cant pars pereleased git version

[6543]

source: go-gitea/gitea#12731

with: 2.28.0.618.gf4bc123cb7
get Malformed version: 2.28.0.618.gf4bc123cb7

[ratmice]

also an issue with the git release candidate 2.29.0.rc1, which is awfully similar to test cases like {"1.2.beta", true},
which are supposed to fail, seems painful with the current regex to get one to work without regressing the other.

[6543]

@ratmice fixed it at 6543#2