Resolve "Creating an Electorate with no existing Electors throws an error"

Closes #10

See merge request t3o/election!12

Resolve "Add date picker in for start and end date"

Closes #12

See merge request t3o/election!10

Change vendor name and update version

See merge request t3o/election!11

Resolve "General things"

Closes #19

See merge request t3o/election!8

Resolve "Disable deprecation log and TypoScript.strictSyntax check"

Closes #27

See merge request t3o/election!7

Resolve "add documentation"

Closes #2

See merge request t3o/election!5