Add new eslint rules (#2121)

The largest changes here are:
- enforcing single quotes for strings
- enforcing trailing commas where possible

In addition to those we have enabled several eslint plugins:
- plugin:requirejs/recommended, to enforce some conventions in require statements
- plugin:node/recommended, to enforce correct usage of various node.js APIs
- plugin:unicorn/recommended, which contains a pretty mixed bag of useful rules

This PR attempts to not change code behavior when possible.  In cases where fixing
existing code would change semantics, a linting exclusion has been placed in the 
code base to silence the error.  You can find these by searching for `eslint-disable-next-line`.

Co-authored-by: Austin Morton <austinpmorton@gmail.com>

lib/compilers/python.js

@@ -23,7 +23,7 @@
 // POSSIBILITY OF SUCH DAMAGE.
 
 const BaseCompiler = require('../base-compiler'),
-    argumentParsers = require("./argument-parsers"),
+    argumentParsers = require('./argument-parsers'),
     path = require('path');
 
 class PythonCompiler extends BaseCompiler {
@@ -36,9 +36,9 @@ class PythonCompiler extends BaseCompiler {
 
     // eslint-disable-next-line no-unused-vars
     processAsm(result, filters) {
-        const lineRe = /^\s{0,4}([0-9]+)(.*)/;
+        const lineRe = /^\s{0,4}(\d+)(.*)/;
 
-        const bytecodeLines = result.asm.split("\n");
+        const bytecodeLines = result.asm.split('\n');
 
         const bytecodeResult = [];
         let lastLineNo = null;