added filter method to minimatch

and options optional
fixed lingering typo in semver
Merge pull request #2251 from Bartvds/def/semver2

fixed lingering typo in semver
Merge pull request #2252 from Bartvds/def/minimatch

added filter method to minimatch
fixed semver.Comparator.set
added definition for bl (BufferList)
Merge pull request #2254 from Bartvds/def/semver2

fixed semver.Comparator.set
Merge pull request #2255 from Bartvds/def/bl

added definition for bl (BufferList)