Update composer Docker tag to v2.8.0

This MR contains the following updates:

Package	Type	Update	Change
composer	final	minor	2.7.8 -> 2.8.0
composer	stage	minor	2.7.8 -> 2.8.0

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This MR has been generated by Renovate Bot.

mentioned in issue #139

changed title from Update composer Docker tag to v2.7.9 to Update composer Docker tag to v2.8.0

changed the description

added 23 commits

• fa939e8d...eb0ab7f9 - 22 commits from branch master
• 1fbc26f8 - Update composer Docker tag to v2.8.0

Compare with previous version

mentioned in commit 742ff751

merged