After "yarn eject" from a create-react-app fresh made app, I see this line:
// jest section:
"collectCoverageFrom": [
"src/**/*.{js,jsx,ts,tsx}",
"!src/**/*.d.ts"
],
What does exclamation mark means here, does it mean "not"? what purpose? to not to run typescript as test?
"!src/**/*.d.ts"