Make sourcemaps include column info

Author: Daniel Gröger

lib/colocated-broccoli-plugin.js

@@ -177,6 +177,7 @@ module.exports = class ColocatedTemplateProcessor extends Plugin {
             source: jsOutputPath,
             file: jsOutputPath,
             includeContent: true,
+            hires: true
           });
 
           jsContents += `\n//# sourceMappingURL=${jsContentsMap.toUrl()}`;