Update Imagecache Actions (SA-CONTRIB-2019-056)

The update is from 1.7 to 1.10. No breaking changes.

1.10:
Fixes: ImageCache Actions - Critical - Multiple Vulnerabilities - SA-CONTRIB-2019-056

Use json for exporting image styles.
Introduce new permission for importing image styles marked as having security implications.

1.9:
Release notes
#2760121: Add a "Perspective" effect
#2947014: PHP 7.2 warning that each() has been deprecated

1.8:
#2917097: PHP 7.1 Warning "A non-numeric value encountered"
#2905130: Remove animation from moving images
#2888678: ImageMagick: Add support for invert effect
#1099300: Notice: A non well formed numeric value encountered in image_gd_definecanvas() (line 250 of ...canvasactions.inc).
#2719661: Division by zero
#2717789: Prevent exif_read_data() warnings
Warning: Theme hook coloractions_invert_summary not found.
#2696225: Add support for multiply color blending
image_styles_admin: sort image styles by label by fietserwin.
#2039379: Add some better examples for using custom actions
Made more contextual information (image style and image effect) available in the custom action and text image effects.
#2690337: Would like a feature for converting case in 'text' effect