Add refresh script

Makefile

@@ -14,10 +14,15 @@ help:
 	@echo 'Targets:'
 	@echo '  clean        Delete `node_modules`'
 	@echo '  help         Print help (this message)'
+	@echo '  refresh      Delete `node_modules` and run `npm install`'
 	@echo '  test         Run tests in silent mode'
 	@echo '  test-verbose Run tests in verbose mode'
 	@echo '  testing      Run tests continuously'
 
+.PHONY: refresh
+refresh: clean
+	npm install
+
 .PHONY: test
 test:
 	NO_DEPRECATION=loopback-datasource-juggler $(TESTER) $(OPTS) $(TESTS)

package.json

@@ -22,6 +22,7 @@
   "scripts": {
     "clean": "make clean",
     "help": "make help",
+    "refresh": "make refresh",
     "test": "make test"
   },
   "engines": [