0.13.1

Fixes

• Fixes Windows file separator regex #451/#452 by @magneticflux-
• Fixes Windows pattern syntax exception on Windows #462 by @pme123
• Adds workaround for NullPointerError in StringTemplate 4 #461 by @steinybot
• Adds proxying support to SSH agent #459 by @steinybot
• Fixes JGitIgnore not closing scala.io.Source #464 by @er1c
• Updates Coursier to 2.0.0-RC6-20 d2f5a1b by @xuwei-k
• Updates JGit to 5.8.0.202006091008-r a11e01b by @xuwei-k