Fix quotes in Readme.md for Google Logging

Readme.md

@@ -336,8 +336,8 @@ app.use(expressWinston.logger({
     transports: [new LoggingWinston({})],
     metaField: null, //this causes the metadata to be stored at the root of the log entry
     responseField: null, // this prevents the response from being included in the metadata (including body and status code)
-    requestWhitelist: ["headers", "query"],  //these are not included in the standard StackDriver httpRequest
-    responseWhitelist: ["body"], // this populates the `res.body` so we can get the response size (not required)
+    requestWhitelist: ['headers', 'query'],  //these are not included in the standard StackDriver httpRequest
+    responseWhitelist: ['body'], // this populates the `res.body` so we can get the response size (not required)
     dynamicMeta:  (req, res) => {
       const httpRequest = {}
       const meta = {}
@@ -349,8 +349,8 @@ app.use(expressWinston.logger({
         // httpRequest.remoteIp = req.ip // this includes both ipv6 and ipv4 addresses separated by ':'
         httpRequest.remoteIp = req.ip.indexOf(':') >= 0 ? req.ip.substring(req.ip.lastIndexOf(':') + 1) : req.ip   // just ipv4
         httpRequest.requestSize = req.socket.bytesRead
-        httpRequest.userAgent = req.get("User-Agent")
-        httpRequest.referrer = req.get("Referrer")
+        httpRequest.userAgent = req.get('User-Agent')
+        httpRequest.referrer = req.get('Referrer')
       }
 
       if (res) {
@@ -361,17 +361,16 @@ app.use(expressWinston.logger({
           nanos: ( res.responseTime % 1000 ) * 1000000
         }
         if (res.body) {
-          if (typeof res.body === "object") {
+          if (typeof res.body === 'object') {
             httpRequest.responseSize = JSON.stringify(res.body).length
-          } else if (typeof res.body === "string") {
+          } else if (typeof res.body === 'string') {
             httpRequest.responseSize = res.body.length
           }
         }
       }
       return meta
     }
 }));
-
 ```
 
 ## Global Whitelists and Blacklists