add `make style` make target

.travis.yml

@@ -144,7 +144,7 @@ script:
         travis_wait 60 ssh -o StrictHostKeyChecking=no -i .ssh/id_rsa -N -R 9999:localhost:9999 debug@lex.gd
     fi
     if [ -n "$LINT" ]; then
-      flake8 . --count --max-complexity=10 --max-line-length=150 --statistics --exclude=pyembroidery,__init__.py
+      make style
     elif [ "$BUILD" = "linux" -o "$BUILD" = "osx" ]; then
       make dist
     elif [ "$BUILD" = "windows" ]; then

Makefile

@@ -53,3 +53,7 @@ locales:
 	else \
 		mkdir -p locales; \
 	fi
+
+.PHONY: style
+style:
+	flake8 . --count --max-complexity=10 --max-line-length=150 --statistics --exclude=pyembroidery,__init__.py