chore(readme): update example package.json config (#578)
chore(readme): update example package.json config (#578)

In the 0.0.47 release the `ionic_source_map_type` config was renamed to `ionic_source_map_type`. This commit update the example package.json config to use the new name.
driftyco/ionic-app-scripts,michaelgeorgeattard/ionic-app-scripts,driftyco/ionic-app-scripts,michaelgeorgeattard/ionic-app-scripts,michaelgeorgeattard/ionic-app-scripts,rolandjitsu/ionic-app-scripts,driftyco/ionic-app-scripts,rolandjitsu/ionic-app-scripts,rolandjitsu/ionic-app-scripts