Interfaces: added dependencies() to the AnalyserExternalVariable class.
Interfaces: added dependencies() to the AnalyserExternalVariable class.

nickerso/libcellml,hsorby/libcellml,cellml/libcellml,cellml/libcellml,nickerso/libcellml,hsorby/libcellml,hsorby/libcellml,nickerso/libcellml,cellml/libcellml,nickerso/libcellml,hsorby/libcellml,cellml/libcellml