Fix ExecJS to 2.7.0 for development and test (#75)
Fix ExecJS to 2.7.0 for development and test (#75)

ExecJS breaks some of Alchemy's transient dependencies, and these are
stable libraries that might not see an update soon.
AlchemyCMS/alchemy-solidus,AlchemyCMS/alchemy-solidus,AlchemyCMS/alchemy-solidus