Bump metaflow version to 2.19.0 (Netflix#2654)

release: 2.18.13 (Netflix#2648)

release: 2.18.12 (Netflix#2638)

Bump metaflow version to 2.18.11 (Netflix#2631)

release: 2.18.10 (Netflix#2625)

Bump version to 2.18.9 (Netflix#2617)

Bump metaflow version to 2.18.8 (Netflix#2615)

Co-authored-by: Nissan Pow <npow@netflix.com>

Bump metaflow version to 2.18.7 (Netflix#2611)

Release 2.18.6 (Netflix#2610)

release: 2.18.5 (Netflix#2604)