Create a Semver package

[nandagopalan]

Create a package to parse and compare Semantic versioning as specified in https://semver.org

[nandagopalan]

The main requirement here is to

1. Ability to parse a semver
2. Compare 2 Semver ( return +ve for greater, -ve for smaller and 0 for equal)
3. Get Next
   • Major Version
   • Minor Version
   • Patch Version
4. Is Pre Release
5. Support semver with both "v" and non "v" prefix ( v1.0.3 =1.0.3) for both parsing and writing.