minor project updates required to keep it working

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Hi, nice example project.

To keep it running, you have to update a few details:

**package.json**
Update the versions and remove `warnings=false` from the list of uglify params.
This worked for me:
```
...
"dependencies": {
"tone": "^14.7.58"
},
"devDependencies": {
"browserify": "^17.0.0",
"budo": "^11.6.4",
"uglify-js": "^3.12.1"
},
"scripts": {
"start": "budo index.js:bundle.js --live",
"build": "browserify index.js | uglifyjs -m -c > bundle.js"
},
...
```

**index.js**
To create an instance of `Synth`
`var synth = new Tone.SimpleSynth().toMaster();`
has to be changed to
`const synth = new Tone.Synth().toDestination();`

Start with package.json and index.js, then run the listed npm start or npm run build commands to check the example. Compare the dependency versions, uglify parameters, and Tone.Synth construction with the requested updates. Done means the project installs and the build and running example work without the outdated settings.

Written by the indexing model from the issue text.