[dev-context] CGModules update: vim syntax highlighting version 2021.03.01 published.

Aditya Mahajan submitted an update to the vim syntax highlighting package. Version number: 2021.03.01 License type: BSD License (simplified) Wants to be in ConTeXt distribution: yes Wants to be synced with CTAN: yes Summary description: This module uses Vim editor's syntax files to syntax highlight verbatim code in ConTeXt Announcement text: ---------------------------------------------------------------------- Fix a regression of issue #37. At some stage, I made a mistake in merging a feature branch and overwrote the changes in the bugfix 3ea3bef9. Reapplying these changes. Closes issue #42. ----------------------------------------------------------------------