Make Gulp an optional peer dependency

sindresorhus · sindresorhus · commit 162fc1622917 · 2019-10-04T15:20:16.000+07:00
diff --git a/package.json b/package.json
@@ -46,6 +46,11 @@
 	"peerDependencies": {
 		"gulp": ">=4"
 	},
+	"peerDependenciesMeta": {
+		"gulp": {
+			"optional": true
+		}
+	},
 	"xo": {
 		"env": [
 			"node",
