build: do not emit test files in build

[armano2]

Proposed changes

• reduce package size by not building test files during build

alternatively we could add .npmignore file and let test files to be built
https://github.com/nfroidure/svg-pathdata/blob/v6.0.3/.npmignore
https://packagephobia.com/[email protected]

Code quality

• I made some tests for my changes

License

To get your contribution merged, you must check the following.

• I read the project license in the LICENSE file
• I agree with publishing under this project license

[NaridaL]

npmignore seems like the way to go

[armano2]

sadly .npmignore is not working with files form package json, i modified package.json instead,

you can verify it before publishing with npm pack