Disable eslint style rules and only use prettier

[vincentfretin]

• Disable eslint space-before-function-paren rule that conflicts with how prettier format the files. Done in Some code cleanup #639
• Update prettier to the latest version and run it again on all the files. Done in Update all dependencies and fix react code warnings #647
• Integrate husky to use a pre-commit hook to format the files for new contributions. Done in Update all dependencies and fix react code warnings #647
• Add Github Actions to run npm run test:ci npm run dist npm run lint and remove the old .travis.yml file. Done in Remove travis and add Github Actions #646

This closes #581

[vincentfretin]

In #639 I disabled the space-before-function-paren eslint rule and specified the singleQuote in prettier config, so now the two tools works well together.

[vincentfretin]

Current prettier version used is 1.15.3, with newer 1.19.1, only 9 files are modified. We should at least modify those 9 files.
If we update to latest prettier 2.7.1, it will modify 33 files.
I'd really like that we update this, it will make any further contributions for me easier, when I'm comparing the files in my project to the one in this repo.

[vincentfretin]

Done in #647