Migrate to .NET Core 3.1

Summary

This feature migrates the project to .NET Core (3.1).
It also introduces C#8 Nullable reference types language feature in SuperMassive core project.
Other improvements are some code clean up, minor refactoring and test coverage.

It is a preparatory work before a complete API overhaul, forecasting version 3.0.

Changes

• feat: migrate projects to .NET Core 3.1
• feat(core): introduce nullable reference types on SuperMassive core library
• refactor(core): various clean up
• refactor(*): change directory structure
• chore(*): migrate projects to .NET Core 3.1
• chore(build): delete useless scripts
• chore(build): add github workflow for continuous integration
• test(core): add some coverage
• doc: update readme

.Net Core Migration

• Migrated projects to .NET Core VS 2017 format.
• Cleaned up the library API
• Fixes many issues and code smells

Semantic Versioning 2.0.0 support

New feature and fixes into SuperMassive core library :

• Semantic Versioning 2.0.0 support with a new RegexHelper and validation attribute (SemverStringAttribute).
• Minor fix : GuidStringAttribute could throw an exception in rare cases.
• UnitTest Helpers improvements

Guard Requires

Added a Precondition check method (Requires) to the Guard class.

Fakers enhancement

• New name faker based star names
• Improved color faker
• Added XML Documentation to generated released (should be deployed with nuget install)
• Removed FFaker.Net dependency

ExceptionHandling & Logging

• Added 2 new libraries : ExceptionHandling and Logging
• Fixed some bugs

StringHelper improvements

Added new methods to StringHelper :

• Camelize: Returns a converted camel cased string into a string delimited by dashes.
• Dasherize: Capitalize the first letter of a string
• CollapseWhiteSpaces: Collapse consecutive white spaces into a single white space

Alpha 1.0.0 - Prerelease

Initial release