Change devDep to dep in Banner and script (#425)

Author: bruugey

.changeset/seven-plants-punch.md

@@ -0,0 +1,5 @@
+---
+'@leafygreen-ui/banner': patch
+---
+
+Make devDependencies just dependencies in package.json

packages/banner/package.json

@@ -12,7 +12,7 @@
   "publishConfig": {
     "access": "public"
   },
-  "devDependencies": {
+  "dependencies": {
     "@leafygreen-ui/lib": "^4.0.0",
     "@leafygreen-ui/emotion": "^2.0.1",
     "@leafygreen-ui/palette": "^2.0.1",

scripts/package-builder.js

@@ -58,7 +58,7 @@ const packageJSON = `
     "publishConfig": {
       "access": "public"
     },
-    "devDependencies": {
+    "dependencies": {
       "@leafygreen-ui/lib": "^4.0.0"
     }
   }