Fix coding style (#263)

https://github.com/archiverjs/node-archiver/blob/master/CONTRIBUTING.md

* Fix to match coding style

Additional modification of the part where fixes were missing

Author: abetomo

lib/error.js

@@ -9,30 +9,30 @@
 var util = require('util');
 
 const ERROR_CODES = {
-  "ABORTED": "archive was aborted",
-  "DIRECTORYDIRPATHREQUIRED": "diretory dirpath argument must be a non-empty string value",
-  "DIRECTORYFUNCTIONINVALIDDATA": "invalid data returned by directory custom data function",
-  "ENTRYNAMEREQUIRED": "entry name must be a non-empty string value",
-  "FILEFILEPATHREQUIRED": "file filepath argument must be a non-empty string value",
-  "FINALIZING": "archive already finalizing",
-  "QUEUECLOSED": "queue closed",
-  "NOENDMETHOD": "no suitable finalize/end method defined by module",
-  "DIRECTORYNOTSUPPORTED": "support for directory entries not defined by module",
-  "FORMATSET": "archive format already set",
-  "INPUTSTEAMBUFFERREQUIRED": "input source must be valid Stream or Buffer instance",
-  "MODULESET": "module already set",
-  "SYMLINKNOTSUPPORTED": "support for symlink entries not defined by module",
-  "SYMLINKFILEPATHREQUIRED": "symlink filepath argument must be a non-empty string value",
-  "SYMLINKTARGETREQUIRED": "symlink target argument must be a non-empty string value",
-  "ENTRYNOTSUPPORTED": "entry not supported"
+  'ABORTED': 'archive was aborted',
+  'DIRECTORYDIRPATHREQUIRED': 'diretory dirpath argument must be a non-empty string value',
+  'DIRECTORYFUNCTIONINVALIDDATA': 'invalid data returned by directory custom data function',
+  'ENTRYNAMEREQUIRED': 'entry name must be a non-empty string value',
+  'FILEFILEPATHREQUIRED': 'file filepath argument must be a non-empty string value',
+  'FINALIZING': 'archive already finalizing',
+  'QUEUECLOSED': 'queue closed',
+  'NOENDMETHOD': 'no suitable finalize/end method defined by module',
+  'DIRECTORYNOTSUPPORTED': 'support for directory entries not defined by module',
+  'FORMATSET': 'archive format already set',
+  'INPUTSTEAMBUFFERREQUIRED': 'input source must be valid Stream or Buffer instance',
+  'MODULESET': 'module already set',
+  'SYMLINKNOTSUPPORTED': 'support for symlink entries not defined by module',
+  'SYMLINKFILEPATHREQUIRED': 'symlink filepath argument must be a non-empty string value',
+  'SYMLINKTARGETREQUIRED': 'symlink target argument must be a non-empty string value',
+  'ENTRYNOTSUPPORTED': 'entry not supported'
 };
 
 function ArchiverError(code, data) {
-    Error.captureStackTrace(this, this.constructor);
-    //this.name = this.constructor.name;
-    this.message = ERROR_CODES[code] || code;
-    this.code = code;
-    this.data = data;
+  Error.captureStackTrace(this, this.constructor);
+  //this.name = this.constructor.name;
+  this.message = ERROR_CODES[code] || code;
+  this.code = code;
+  this.data = data;
 }
 
 util.inherits(ArchiverError, Error);