version bump for 3.0.0 release (mimblewimble#3179)

version bump (mimblewimble#3174)

Versioning for 3.0.0-beta.2 (mimblewimble#3170)

* versioning for beta build

* Cargo.lock

Version bump for beta.1 (mimblewimble#3159)

Version bump for 2.1.1 release (mimblewimble#3104)

Version bump for 2.1.0 release

v2.1.0 beta release 3

v2.1.0 beta release 2

change release versioning for 2.1.0 beta build (mimblewimble#3056)

change version to 2.0.0 for release