Add install and update-deps Makefile targets

Author: ianmjones

Makefile

@@ -38,9 +38,16 @@ zip: all
 .PHONY: package
 package: zip
 
+.PHONY: install
+install: node_modules
+
 node_modules: package.json
 	yarn install
 
+.PHONY: update-deps
+update-deps:
+	yarn upgrade
+
 .PHONY: product-info
 product-info:
 	php build-cfg/utils/create-json.php README.txt better-search-replace.php > builds/info.json