fix: wrong imports in error

Author: mthpvg

src/cursor.js

@@ -6,7 +6,7 @@ import * as content from './content'
 import * as parser from './parser'
 import * as string from './util/string'
 import * as nodeType from './node-type'
-import * as error from './util/error'
+import error from './util/error'
 import * as rangeSaveRestore from './range-save-restore'
 
 /**

src/range-save-restore.js

@@ -1,5 +1,5 @@
 import rangy from 'rangy'
-import * as error from './util/error'
+import error from './util/error'
 import * as nodeType from './node-type'
 
 /**

src/util/error.js

@@ -1,4 +1,4 @@
-import config from '../config'
+import * as config from '../config'
 
 // Allows for safe error logging
 // Falls back to console.log if console.error is not available