Merge pull request bolt#3215 from bolt/release/5.1.9

Prepare release 5.1.9

Update migrations

Merge pull request bolt#3160 from nicolas-grekas/patch-1

Bump flex to ^1.17, v1.13 is going to stop working very soon

Merge pull request bolt#3160 from nicolas-grekas/patch-1

Bump flex to ^1.17, v1.13 is going to stop working very soon

Merge pull request bolt#3157 from bolt/release/5.1.7

Prepare release 5.1.7

Update m_2022-03-25-services.yaml

Tweaking default config a little bit

Merge pull request bolt#3134 from bolt/release/5.1.5

Prepare release 5.1.5

Merge pull request bolt#3118 from bolt/fix/migrations

Fix YAML migrations

Merge pull request bolt#3088 from bolt/release/5.1.3

Prepare release 5.1.3