No checked in dependencies.json on master.

[zepumph]

Over in phetsims/perennial#330 we found that area-builder doesn't have a dependencies.json on master. It was actually pretty great that this was the case, since it helped find a bigger bug, but we should clean this up and check one it.

I used this command to see that no other sim repos need a dependencies.json file on master:

find . -maxdepth 1 -mindepth 1 -type d '!' -exec test -e "{}/dependencies.json" ';' -print

./.idea ./aqua ./area-builder ./area-model-common ./assert ./axon ./babel ./bamboo ./binder ./brand ./cert ./chipper ./codap ./community ./decaf ./density-buoyancy-common ./dot ./fenster ./fractions-common ./inverse-square-law-common ./joist ./js ./kite ./mobius ./monday ./nitroglycerin ./number-line-common ./patches ./perennial ./perennial-alias ./phet-core ./phet-info ./phet-io ./phet-io-client-guides ./phet-io-sim-specific ./phet-io-website ./phet-io-wrapper-arithmetic ./phet-io-wrapper-classroom-activity ./phet-io-wrapper-hookes-law-energy ./phet-io-wrapper-lab-book ./phet-io-wrappers ./phet-lib ./phetcommon ./phetmarks ./phettest ./qa ./quake ./query-string-machine ./sandbox ./scenery ./scenery-lab-demo ./sherpa ./shred ./skiffle ./solar-system-common ./studio ./tandem ./tangible ./tasks ./tmp ./utterance-queue ./vibe ./weddell ./yotta