Version bump

The .Update case will be a breaking change for any switch statements
that were previously exhaustive.

Author: jkennington

ReactiveArray/Info.plist

@@ -15,7 +15,7 @@
 	<key>CFBundlePackageType</key>
 	<string>FMWK</string>
 	<key>CFBundleShortVersionString</key>
-	<string>0.3.0</string>
+	<string>0.4.0</string>
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>