Update bignumber.js to 6.0.0

Author: dougwilson

Changes.md

@@ -12,6 +12,7 @@ you spot any mistakes.
 * Remove special case for handshake in determine packet code
 * Small performance improvement starting command sequence
 * Support Node.js 11.x
+* Update `bignumber.js` to 6.0.0
 
 ## v2.16.0 (2018-07-17)
 

lib/protocol/Parser.js

@@ -200,7 +200,7 @@ Parser.prototype.parseLengthCodedNumber = function parseLengthCodedNumber() {
   var value;
 
   if (high >>> 21) {
-    value = (new BigNumber(low)).plus((new BigNumber(MUL_32BIT)).times(high)).toString();
+    value = BigNumber(MUL_32BIT).times(high).plus(low).toString();
 
     if (this._supportBigNumbers) {
       return value;

package.json

@@ -13,7 +13,7 @@
   ],
   "repository": "mysqljs/mysql",
   "dependencies": {
-    "bignumber.js": "4.1.0",
+    "bignumber.js": "6.0.0",
     "readable-stream": "2.3.6",
     "safe-buffer": "5.1.2",
     "sqlstring": "2.3.1"