Just enable compilation to get cached downloads.
Just enable compilation to get cached downloads.

The previous run failed with a lot of errors.
```
[error] Failed: Total 1481, Failed 100, Errors 0, Passed 1381
[error] Failed tests:
[error]     scala.meta.tests.parsers.SbtSuite
[error]     scala.meta.tests.invariants.InvariantSuite
[error]     scala.meta.tests.quasiquotes.SuccessSuite
[error]     ErrorSuite
[error]     scala.meta.tests.prettyprinters.SyntacticSuite
[error]     scala.meta.tests.ast.ReflectionSuite
[error]     scala.meta.tests.prettyprinters.PublicSuite
[error]     scala.meta.tests.tokens.ReflectionSuite
[error]     scala.meta.tests.inputs.FormatMessageSuite
[error]     scala.meta.tests.transversers.TransverserSuite
[error]     scala.meta.tests.inputs.OffsetLineColumnSuite
[error]     scala.meta.tests.api.SurfaceSuite
[error]     scala.meta.tests.io.FragmentSuite
[error]     scala.meta.tests.io.MultipathSuite
```
It's best to merge something to get cached downloads before trying to
fix those errors.

MasseGuillaume/scalameta,DavidDudson/scalameta,xeno-by/scalameta,xeno-by/scalameta,scalameta/scalameta,xeno-by/scalameta,MasseGuillaume/scalameta,MasseGuillaume/scalameta,olafurpg/scalameta,scalameta/scalameta,olafurpg/scalameta,scalameta/scalameta,DavidDudson/scalameta,scalameta/scalameta,scalameta/scalameta,olafurpg/scalameta