Fixed typo

Author: c-plus-plus-equals-c-plus-one

src/components/colorscale/index.js

@@ -17,7 +17,7 @@ module.exports = {
     calc: require('./calc'),
 
     // ./scales.js is required in lib/coerce.js ;
-    // it needs to be a separate module to avoid circular a dependency
+    // it needs to be a separate module to avoid a circular dependency
     scales: scales.scales,
     defaultScale: scales.defaultScale,
     getScale: scales.get,