Update to manifest v3 (#25)

[ImgBot] Optimize images

*Total -- 229.90kb -> 216.88kb (5.66%)

/docs/chrome-webstore/smallCampagne.png -- 33.08kb -> 24.78kb (25.09%)
/docs/chrome-webstore/screenshot2.jpg -- 94.33kb -> 91.89kb (2.6%)
/docs/chrome-webstore/screenshot1.jpg -- 94.04kb -> 91.79kb (2.4%)
/docs/chrome-webstore/icon.png -- 8.45kb -> 8.43kb (0.16%)

Signed-off-by: ImgBotApp <[email protected]>

Bump to v1.2.0

Refactoring

* New class names
* Rearranged manifest.json according to chrome documentation and added some data
* Version bump

Lint disalbe specific rule

Winter 2019 upgrade

* Discount data moved to another repo on github
* Discount data is now a valid JSON
* Added new discount service: coop
* Reformatted discount object
* Fix problem with URL extractor in options.js
* New design on settings page
* Link format changed
* Added encoding to html
* Version check edit bagground
* On update prompts for new settings due to new discount service (coop)

Added color to output

Version updated

Version number changed to 1.0.2

New data scrape

Data scrape from 2019-11-05

Update manifest.json