Yarn 1.21.1 support in build che related projects

[vzhukovs]

Is your task related to a problem? Please describe.

There is a need to add support yarn 1.21.1 in the following projects:

• https://github.com/eclipse/theia-plugin-packager

• https://github.com/eclipse/che-theia/tree/master/generator

The problem, which blocks us to use latest stable version of yarn (1.21.1) is that, the binary entries, generated in these projects uses semicolon in file names. There was a breaking change in this version (1.21.1) that disallows using semicolons in binary names (see comment, comment and the following PR in yarn repository)

Linked issue: eclipse-theia/theia-plugin-packager#8

Describe the solution you'd like

Change the binary names, that provided in following package.json, to the names that uses only dashes. And update, if need, docker images to use the latest yarn.

Describe alternatives you've considered

Update only bin entry in package.json, for backward compatibility and leave yarn version in docker images as is.

Additional context

N/A