Merge remote-tracking branch 'origin/releases/0.19.1rc2' into 0.19.la…

…test

Merge remote-tracking branch 'origin/releases/0.18.2' into 0.18.latest

Merge remote-tracking branch 'origin/releases/0.19.1rc1' into 0.19.la…

…test

Merge remote-tracking branch 'origin/releases/0.18.2rc1' into 0.18.la…

…test

Merge remote-tracking branch 'origin/releases/0.19.1b2' into 0.19.latest

Merge remote-tracking branch 'origin/releases/0.19.0' into dev/kiyosh…

…i-kuromiya

Merge remote-tracking branch 'origin/releases/0.19.0rc2' into dev/kiy…

…oshi-kuromiya

Merge remote-tracking branch 'origin/releases/0.19.0rc1' into dev/kiy…

…oshi-kuromiya

Merge remote-tracking branch 'origin/releases/0.19.0b1' into dev/kiyo…

…shi-kuromiya

Merge remote-tracking branch 'origin/releases/0.18.1' into dev/0.18.1