Use asArray.

Author: davidlehn

lib/ContextResolver.js

@@ -8,6 +8,9 @@ const {
   isObject: _isObject,
   isString: _isString,
 } = require('./types');
+const {
+  asArray: _asArray
+} = require('./util');
 const {prependBase} = require('./url');
 const JsonLdError = require('./JsonLdError');
 const ResolvedContext = require('./ResolvedContext');
@@ -32,9 +35,7 @@ module.exports = class ContextResolver {
     }
 
     // context is one or more contexts
-    if(!_isArray(context)) {
-      context = [context];
-    }
+    context = _asArray(context);
 
     // resolve each context in the array
     const allResolved = [];