Restore highcharts on phosphor/jlab until d3 is complete#608

Merged

texodus merged 2 commits intomasterfrom highcharts

Jun 6, 2019

+4-1

Commits on Jun 4, 2019

Restore highcharts for now until names change (e.g. d3_y_line -> just y_line)
timkpaine
committed

Commits on Jun 6, 2019

Fix yarn issue on Travis
texodus
committed