Optimization
Memo-ize classes that can be created at a high rate
coursier.core.{Dependency, Module, Publication} are now memo-ized (using weak references). This can lower the amount of duplicate instances of these objects, and lower GC pressure.
Added in #1900, thanks to @jtjeferreira.
Fixes
Un-escape characters in file URLs
When using local repositories with special characters in their paths, such as spaces, escaped characters were not properly handled, which created spurious not-found errors.