update remix-analyzer syntax to use const, let and this

remix-analyzer/index.js

-var CodeAnalysis = require('./src/solidity-analyzer')
+const CodeAnalysis = require('./src/solidity-analyzer')
 
 module.exports = {
   CodeAnalysis: CodeAnalysis

remix-analyzer/src/solidity-analyzer/index.js

 'use strict'
-var AstWalker = require('remix-lib').AstWalker
-var list = require('./modules/list')
+const AstWalker = require('remix-lib').AstWalker
+const list = require('./modules/list')
 
 function staticAnalysisRunner () {
 }
 
 staticAnalysisRunner.prototype.run = function (compilationResult, toRun, callback) {
-  var self = this
-  var modules = toRun.map(function (i) {
-    var m = self.modules()[i]
+  const modules = toRun.map((i) => {
+    const m = this.modules()[i]
     return { 'name': m.name, 'mod': new m.Module() }
   })
 
@@ -16,12 +15,12 @@ staticAnalysisRunner.prototype.run = function (compilationResult, toRun, callbac
 }
 
 staticAnalysisRunner.prototype.runWithModuleList = function (compilationResult, modules, callback) {
-  var reports = []
+  let reports = []
   // Also provide convenience analysis via the AST walker.
-  var walker = new AstWalker()
-  for (var k in compilationResult.sources) {
-    walker.walk(compilationResult.sources[k].legacyAST, {'*': function (node) {
-      modules.map(function (item, i) {
+  const walker = new AstWalker()
+  for (let k in compilationResult.sources) {
+    walker.walk(compilationResult.sources[k].legacyAST, {'*': (node) => {
+      modules.map((item, i) => {
         if (item.mod.visit !== undefined) {
           try {
             item.mod.visit(node)
@@ -38,8 +37,8 @@ staticAnalysisRunner.prototype.runWithModuleList = function (compilationResult,
 
   // Here, modules can just collect the results from the AST walk,
   // but also perform new analysis.
-  reports = reports.concat(modules.map(function (item, i) {
-    var report = null
+  reports = reports.concat(modules.map((item, i) => {
+    let report = null
     try {
       report = item.mod.report(compilationResult)
     } catch (e) {