Bump package versions for 1.6.2-beta.20 release.

I made a mistake while publishing 1.6.2-beta.16 that means it's easier to
just skip that version.

Bump package versions for 1.6.2-beta.19 release.

I made a mistake while publishing 1.6.2-beta.16 that means it's easier to
just skip that version.

Bump package versions for 1.6.2-beta.18 release.

I made a mistake while publishing 1.6.2-beta.16 that means it's easier to
just skip that version.

Bump package versions for 1.6.2-beta.17 release.

I made a mistake while publishing 1.6.2-beta.16 that means it's easier to
just skip that version.

Bump package versions for the official 1.6.1.1 release.

Bump package versions for 1.6.1.1-rc.0 release.

Bump package versions for the official 1.4.4.6 release.

Bump package versions for 1.4.4.6-rc.1 release.

Bump package versions for the official 1.5.4.2 release.

Bump package versions for 1.4.4.6-rc.0 release.