Enabled some basic output settings for babel to produce leaner output…

… by default. Adjusted tests for reversing this, though.

__tests__/index.js

@@ -3,6 +3,10 @@ import buildPreset from "../src"
 
 const options = buildPreset(null, { modules: false, target: { browsers: "ie 11" } })
 
+// Keep formatting for tests (to keep output/diffs readable)
+options.minified = false
+options.compact = false
+
 test("ES2015: Classes", () => {
   expect(transform(`class Component{ main() { } }`, options).code).toMatchSnapshot()
 })

src/index.js

@@ -139,6 +139,15 @@ export default function buildPreset(context, opts = {})
 
   // Assemble final config
   return {
+    // Just some basic minification
+    comments: false,
+    compact: true,
+    minified: true,
+
+    // Enable source maps by default
+    sourceMaps: true,
+
+    // And all the previously built lists of presets and plugins
     presets,
     plugins
   }