bump v0.30.0 (#2462)

Merge branch 'dev-1.x' into 1.x

Merge pull request #2385 from open-mmlab/dev-1.x

Merge MMSegmentation 1.x development branch dev-1.x to main branch 1.x for v1.0.0rc2

Merge pull request #2257 from xiexinch/bumpv0.29.1

bumpv0.29.1

Merge pull request #2252 from MeowZheng/v1.0.0rc1

Bump V1.0.0rc1

Bump v0.29.0 (#2167)

* bump v0.29.0

* remove 2159

Bump v0.28.0 (#2047)

* bump v0.28.0

* update

Add changelog for MMSeg 1.0.0rc0 (#2007)

* Bump 1.0.0rc0

* rephase

* rephase

Bump v0.27.0 (#1836)

* Bump v0.26.1

* update version

* fix mmcv requirement

Bump v0.26.0 (#1731)