accept numbers in travis build

util/travis_build.sh

@@ -11,7 +11,7 @@ if [[ "$TRAVIS_COMMIT_MESSAGE" != *"[skip build]"* ]] ; then
 		make all-keyboards AUTOGEN="true"
 		: $((exit_code = $exit_code + $?))
 	else
-		MKB=$(git diff --name-only -n 1 ${TRAVIS_COMMIT_RANGE} | grep -oP '(?<=keyboards\/)([a-zA-Z_]+)' | sort -u)
+		MKB=$(git diff --name-only -n 1 ${TRAVIS_COMMIT_RANGE} | grep -oP '(?<=keyboards\/)([a-zA-Z0-9_]+)' | sort -u)
 		for KB in $MKB ; do
 			echo "Making all keymaps for $KB"
 			make "$KB" AUTOGEN=true