v0.13.2

AlgebraOfGraphics v0.13.2

Diff since v0.13.1

Merged pull requests:

• Minor fixes in the manuscript and bibliography (#782) (@jbytecode)
• fix(scales): Keep verbatim data out of other layers' scales (#786) (@jkrumbiegel)

Closed issues:

• Citing this library (#571)
• Add CONTRIBUTING.md (#778)
• verbatim and scale is required to control a second color scale (#785)