Far-future expire only for assets w/ fingerprints
Prevent cache stampede
Run dotenv task in sequence instead of using lock

This ensures that logging output doesn't clobber the input prompt when
running against multiple servers. The parallel mode (default) meant that
other operations could be happening while the user is trying to type.
Only using input masking for "secret" keys
Consolidate highline require statements
Prep 0.14.0 release