subtract one example missing tonal package :)

[LasseMunk]

Hi !

Sorry I'm new to working with github (coming from bitbucket) and open source projects.

I'm unsure what the correct approach is to make a PR with a bugfix :) (please correct me / tell me the right approach to contributing)

I had a an error in the subtractone example. Which was fixed by cd

cd /gui 
npm i @tonaljs/tonal

error:

ERROR in ./src/actions/actions.js 4:0-48

Module not found: Error: Can't resolve '@tonaljs/tonal' in 'C:\repos\cmajor\examples\cmajor\examples\patches\SubtractOne\gui\src\actions'

suggested fix:
package.json:
...
"dependencies": {
"@tonaljs/midi": "^3.3.1",
"@tonaljs/tonal": "^4.10.0",
"framer-motion": "^1.6.7",
"react": "^16.9.0",
"react-dom": "^16.9.0",
"react-redux": "^7.1.1",
"react-scripts": "^5.0.1",
"styled-components": "^4.4.0",
"tonal": "^2.2.2"
},
..