Remove readable-stream and safe-buffer (#2640)

* Add json support to the query builder for mysql

refs #1036

Based on #1902

* Clarify supported version

* Use native Buffer and Stream implementations

package.json

@@ -15,12 +15,10 @@
     "inherits": "~2.0.3",
     "interpret": "^1.1.0",
     "liftoff": "2.5.0",
-    "lodash": "^4.17.5",
+    "lodash": "^4.17.10",
     "minimist": "1.2.0",
     "mkdirp": "^0.5.1",
     "pg-connection-string": "2.0.0",
-    "readable-stream": "2.3.6",
-    "safe-buffer": "^5.1.1",
     "tarn": "^1.1.4",
     "tildify": "1.2.0",
     "uuid": "^3.2.1",

src/dialects/oracledb/index.js

@@ -12,7 +12,6 @@ const stream = require('stream');
 const Transaction = require('./transaction');
 const Client_Oracle = require('../oracle');
 const Oracle_Formatter = require('../oracle/formatter');
-const Buffer = require('safe-buffer').Buffer;
 
 function Client_Oracledb() {
   Client_Oracle.apply(this, arguments);

src/runner.js

@@ -75,7 +75,7 @@ assign(Runner.prototype, {
     const hasHandler = typeof handler === 'function';
 
     // Lazy-load the "PassThrough" dependency.
-    PassThrough = PassThrough || require('readable-stream').PassThrough;
+    PassThrough = PassThrough || require('stream').PassThrough;
 
     const runner = this;
     const stream = new PassThrough({objectMode: true});

test/tape/stream.js

@@ -1,7 +1,7 @@
 'use strict';
 
 var tape   = require('tape')
-var stream = require('readable-stream')
+var stream = require('stream')
 
 module.exports = function(knex) {