Allow create() to be used recursively (#2795)

Co-authored-by: NJay <jasonsaayman@gmail.com>

lib/axios.js

@@ -22,6 +22,11 @@ function createInstance(defaultConfig) {
   // Copy context to instance
   utils.extend(instance, context);
 
+  // Factory for creating new instances
+  instance.create = function create(instanceConfig) {
+    return createInstance(mergeConfig(defaultConfig, instanceConfig));
+  };
+
   return instance;
 }
 
@@ -31,11 +36,6 @@ var axios = createInstance(defaults);
 // Expose Axios class to allow class inheritance
 axios.Axios = Axios;
 
-// Factory for creating new instances
-axios.create = function create(instanceConfig) {
-  return createInstance(mergeConfig(axios.defaults, instanceConfig));
-};
-
 // Expose Cancel & CancelToken
 axios.Cancel = require('./cancel/Cancel');
 axios.CancelToken = require('./cancel/CancelToken');