FreeBSD/ports 571222a (r518040)www/yarn Makefile, www/yarn-node10 Makefile

www/yarn: add support to node.js 12.x

While here, fix CONFLICTS definition

Sponsored by:   trivago N.V.
DeltaFile
+4-2www/yarn/Makefile
+2-2www/yarn-node10/Makefile
+2-2www/yarn-node8/Makefile
+8-63 files

UnifiedSplitRaw