changed casks to formula
DartEditorDev now version 1.3.0-dev.3.2 (revision 33495)
DartEditorEdge now version 1.3.0-edge.33540 (revision 33540)
DartEditorEdgeCs now version 1.3.0-edge.33533 (revision 33533)
DartEditorStable now version 1.2.0 (revision 33014)
DartContentShellDev now version 1.3.0-dev.3.2 (revision 33495)
DartContentShellEdge now version 1.3.0-edge.33540 (revision 33540)
DartContentShellStable now version 1.2.0 (revision 33014)