v2.0.0 mkcert on ubuntu (and my script on MacOS)

[daquinoaldo]

PR Details

Automatically run a postinstall script that trust the generated certificate on MacOS and Ubuntu.

Description

The script uses openssl on MacOS and adds the CA certificate to the Mac trust store.
On Ubuntu uses the mkcert tool.

Motivation and Context

It really helps in automating the process for users. Now in the two most popular OS there is no need for an additional user interaction.

How Has This Been Tested

It is not tested automatically, but has been tested on Ubuntu 18.04 LTS and MacOS Mojave.

Types of changes

• Docs change / refactoring / dependency upgrade
• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes. Is too expensive to test it automatically.
• All new and existing tests passed.

[coveralls]

Coverage remained the same at 100.0% when pulling 8ff74bb on mkcert into b22b3e0 on master.