Increment semantic versioning strings in shell scripts.
$ ./increment_version.sh
usage: increment_version.sh [-Mmp] major.minor.patch
$ ./increment_version.sh -p 0.0.0
0.0.1
$ ./increment_version.sh -m 0.0.3
0.1.0
$ ./increment_version.sh -M 1.1.15
2.0.0
$ ./increment_version.sh -Mmp 2.3.4
3.1.1