Server-side bundling fails due to octals in ansi-color

[shannonmoeller]

When trying to use bufrw (via thriftrw) in an environment where server side code is bundled with Babel and Webpack, the build process throws an error related to using Octal literals in strict mode:

error: ./node_modules/ansi-color/lib/ansi-color.js
Module build failed (from ./node_modules/fusion-cli/build/loaders/babel-loader.js):
SyntaxError: /var/tmp/project/node_modules/ansi-color/lib/ansi-color.js: Octal literal in strict mode (35:18)

  33 |   var ansi_str = "";
  34 |   for(var i=0, attr; attr = color_attrs[i]; i++) {
> 35 |     ansi_str += "\033[" + ANSI_CODES[attr] + "m";
     |                   ^
  36 |   }
  37 |   ansi_str += str + "\033[" + ANSI_CODES["off"] + "m";
  38 |   return ansi_str;
    at Parser.raise (/var/tmp/project/node_modules/@babel/parser/lib/index.js:6322:17)
    at Parser.readEscapedChar (/var/tmp/project/node_modules/@babel/parser/lib/index.js:7418:20)
    at Parser.readString (/var/tmp/project/node_modules/@babel/parser/lib/index.js:7265:21)
    at Parser.getTokenFromCode (/var/tmp/project/node_modules/@babel/parser/lib/index.js:6950:14)
    at Parser.nextToken (/var/tmp/project/node_modules/@babel/parser/lib/index.js:6520:12)
    at Parser.next (/var/tmp/project/node_modules/@babel/parser/lib/index.js:6460:10)
    at Parser.parseMaybeAssign (/var/tmp/project/node_modules/@babel/parser/lib/index.js:8210:12)
    at Parser.parseExpression (/var/tmp/project/node_modules/@babel/parser/lib/index.js:8120:23)
    at Parser.parseStatementContent (/var/tmp/project/node_modules/@babel/parser/lib/index.js:9892:23)
    at Parser.parseStatement (/var/tmp/project/node_modules/@babel/parser/lib/index.js:9763:17)
    at Parser.parseBlockOrModuleBlockBody (/var/tmp/project/node_modules/@babel/parser/lib/index.js:10340:25)
    at Parser.parseBlockBody (/var/tmp/project/node_modules/@babel/parser/lib/index.js:10327:10)
    at Parser.parseBlock (/var/tmp/project/node_modules/@babel/parser/lib/index.js:10311:10)
    at Parser.parseStatementContent (/var/tmp/project/node_modules/@babel/parser/lib/index.js:9839:21)
    at Parser.parseStatement (/var/tmp/project/node_modules/@babel/parser/lib/index.js:9763:17)
    at node.body.withTopicForbiddingContext (/var/tmp/project/node_modules/@babel/parser/lib/index.js:10374:60)
 @ ./node_modules/bufrw/error_highlighter.js 22:12-33
 @ ./node_modules/bufrw/interface.js
 @ ./node_modules/bufrw/index.js
 @ ./node_modules/thriftrw/index.js
 @ ./src/server/lib/thrift-http.js
 @ ./src/server/app.js

Are you open to a PR replacing the use of ansi-color with ansi-colors or chalk?