Merge branch 'develop'

bump version to v6.1.0-beta.4

updates and bump version to v6.1.0-beta.3

Fix forking.

Update ganache-core dependency, bump beta version number

Change to version 6.1.0-beta.0 because there are no longer any breaki…

…ng changes from 6.0.x

bump version number and fix up build dependencies

6.0.3

6.0.2

6.0.1