Configure new-component to use typescript

This is the right form of configuring new-component to generate a tsx
component. However, I think we might want to build our own new-component
script to generate templates that are specific to our needs; the
typescript template from new-component doesn't really set us up to build
a typed component.

packages/squared/.new-component-config.json

@@ -1,4 +1,4 @@
 {
-  "lang": "tsx",
+  "lang": "ts",
   "dir": "src/components"
 }