Fixed formatting in READMEs.

Merge pull request #10 from rickogden/upgrade/php-8.3

Upgrade/php 8.3

Merge pull request #9 from rickogden/upgrade/php8.2

Upgrade/php8.2

Merge branch 'refactor/calculators'

Bugfix: WKT Point transformer.

Coding standards.

Merge pull request #7 from rickogden/update/php8

Update/php8

Merge pull request #6 from rickogden/feature/comparison-methods

Feature/comparison methods

Merge pull request #5 from rickogden/fix/get-geometries-call

Fixed get geometries call

Added PHP 7.3 to test environments.