Bug: correct R depenency error with ggplot2_heatmap2/3.3.0+galaxy0

[jennaj]

toolshed.g2.bx.psu.edu/repos/iuc/ggplot2_heatmap2/ggplot2_heatmap2/3.3.0+galaxy0

Workaround for end users

1. Load the tool form
2. Change the version 3.2.0+galaxy1 and use it instead for now

Thanks to all who reported the problem!