Increase compiler timeout so tests pass

[jlapeyre]

Closes #195

The test suite reports errors due to timeouts communicating with the compiler. The test suite passes locally with this PR.

Checklist

• [x] The above description motivates these changes.
• [x] All new and existing tests pass locally and on Semaphore.
• [x] (Bugfix) The associated issue is referenced above using
• [x] The changelog (docs/source/changes.rst) has a description of this change.