changing to publishing testing packages from master

Author: grisumbras

.github/main.workflow

@@ -18,6 +18,7 @@ action "build" {
   uses = "./.github/cpt/"
   env = {
     CONAN_CHANNEL = "testing"
+    CONAN_STABLE_BRANCH_PATTERN = "\\d+\\.\\d+(\\.\\d+[-\\w\\.]*)?"
     CONAN_PRINT_RUN_COMMANDS = "1"
     CONAN_REMOTES = "https://api.bintray.com/conan/bincrafters/public-conan"
     CONAN_UPLOAD = "https://api.bintray.com/conan/grisumbras/conan"