v1.3.0 - Added custom language support

Added

• Support for WGSL and eFLINT.
• A section on the definition of custom languages in the README.md file.
• The possibility to define your own languages using the new file-header-generator.customLanguages property.

Changed

• The file-header-generator.rustDocString property to file-header-generator.docString.
• The order of the CHANGELOG.md file
• The dates in the CHANGELOG.md file

Fixed

• Security vulnerability by bumping luxon to 2.5.2.