Independent relase of icu_testdata 1.1.2

Independent release of icu_datagen 1.1.2

1.1 Changelog (unicode-org#3031)

ICU4X 1.0

Cargo.toml fixups for ICU4X 1.0.0-beta1

Issue 1861 icu4x 0.6 (unicode-org#1871)

* Update Changelog for 0.6

* Publish 0.6

icu4x 0.5

Update version numbers for 0.4.1

Add missing dependency version numbers

Bump Yoke to 0.2.3