Add image metapackage now that Pillow is packaged for EPEL9.

[20221105]

Added

• Output converter for the hOCR format (#651)
• Font name aliases for Arial, Courier New and Times New Roman (#790)
• Documentation on why special characters can sometimes not be extracted (#829)

Fixed

• ValueError when bmp images with 1 bit channel are decoded (#773)
• ValueError when trying to decrypt empty metadata values (#766)
• Sphinx errors during building of documentation (#760)
• TypeError when getting default width of font (#720)
• Installing typing-extensions on Python 3.6 and 3.7 (#775)
• TypeError in cmapdb.py when parsing null characters (#768)
• Color "convenience operators" now (per spec) also set color space (#794)
• ValueError when extracting images, due to breaking changes in Pillow (#827)
• Small typo's and issues in the documentation (#828)

Deprecated

• Usage of if __name__ == "__main__" where it was only intended for testing purposes (#756)