[gimp-web/master] (30 commits) ...Merge branch 'testing' for 2.10.20 news

[Alexandre Prokoudine <aprokoudine src gnome org>]

Summary of changes:

  f3597ef... 2.10.20: add release notes skeleton (*)
  5f3d5d8... 2.99.2: move old 2.99.2 folder around (*)
  07d1bf1... 2.99.2: update preliminary release date, tweak highlights j (*)
  5a8ae7e... Wilber & Co. comics strip for 2.10.20 release. (*)
  24a5d5c... gimp_versions.json: add GIMP 2.10.20 source file (*)
  ea0f1c5... Updating the Wilber & Co. strip. (*)
  fc2d6e8... 2.10.20: some content for release notes, more to follow (*)
  1f9863a... 2.10.20: Bloom filter fixme so that I don't forget about it (*)
  a0e1b58... 2.10.20: more text, some FIXMEs left to do yet (*)
  0629574... 2.10.20: some more on focus blur (*)
  a329ee6... 2.10.20: Other Changes section (*)
  9bf834d... 2.10.20: markup, contributors (*)
  754197e... 2.10.20: add some screenshots (*)
  a8d6c89... 2.10.20: add Lens Blur screenshot (*)
  ab634cf... 2.10.20: add Bloom screenshot (*)
  c8a51a5... 2.10.20: actually add reference to lens blur screenshot (*)
  9a9bd20... 2.10.20: kill extra image, update alts (*)
  86a9a21... 2.10.20: new Focus Blur screenshot (*)
  39b901f... 2.10.20: add Variable Blur screenshot (*)
  50d4132... 2.10.20: various additions (*)
  efd192c... 2.10.20: we can't use markdown in figcaptions (*)
  2a6a97c... 2.10.20: remove redundant text (*)
  84215f9... downloads: add trailing / to one mirror url to make mirror  (*)
  5aefcf3... downloads: add GIMP 2.10.20 installer for Microsoft windows (*)
  9fb6cd5... Merge branch 'testing' of https://gitlab.gnome.org/Infrastr (*)
  a15dd1a... 2.10.20: bump the release date (*)
  b1cdebd... tools: add simple download mirrors checker (*)
  571772b... Merge branch 'testing' of https://gitlab.gnome.org/Infrastr (*)
  c742720... 2.10.20: bump the release date, tiny markup fix (*)
  d8c7143... Merge branch 'testing' for 2.10.20 news

(*) This commit already existed in another branch; no separate mail sent