Nodemon not reloading. What's wrong with this nodemon.json file

Solved!

By running nodemon in verbose mode I have discovered that by default it watches only *.js files, regardless of what wildcard you are watching. Therefore adding -e ts to the command fixes the problem:

nodemon --watch src/ --exec 'node out/index.js' -e ts

If someone uses nodemon.json here is mine after fix:

{ 
    "watch": ["src"],
    "exec": "tsc && node out/index.js" ,
    "ext": "js, json, ts, proto"
}