We test that the pipeline status bar item gets correcly populated.

We were using version 1 which doesn't have type definitions. The upgrade
is trivial and hence easier than writing our own type definitions.

find the intersection of git remotes hostnames and PATs hostnames,
and if the intersection has exactly one hostname,
use that as the instanceUrl, otherwise just do nothing.

This change introduces Jest test framework to run our unit tests.

Implementing integration and unit tests using mocha and adding two
documents that describe the testing strategy and guide how to write
new tests.

Using conventional-changelog to automatically generate changelog
from conventional commits created since the last tag.

Signed-off-by: NMassimeddu Cireddu <massimeddu@gmail.com>

* Handle 'ssh://' URLs
* Correctly parse 'git://' URLs with specified port

Should fix issue #48