Updated dependencies

Warning

All React Material products have now the same version, i.e. 1.7.0.

• All linting errors are solved now, but due to google analytics stuff, we've needed to add target="_blank" to our links, so this lint error still exists.

Bug fixing

• Bugs from updated dependencies
• Removed .env file, and replaced it with the jsconfig.json file
• Changes caused by running the prettier command for .jsx, .js, .html and .css files
• Changed all string refs to React.createRef()
• Added types validation in each component
• Solved linting issues
• Solved #83

Major style changes

Deleted components

Added components

Deleted dependencies

Added dependencies

• typescript@3.5.1 (To stop console warnings on install)

Updated dependencies

@material-ui/core          3.9.2   →    4.1.0
@material-ui/icons         3.0.2   →    4.1.0
chartist                  0.10.1   →   0.11.2
history                    4.7.2   →    4.9.0
prettier                  1.16.4   →   1.18.2
prop-types                15.7.1   →   15.7.2
react                     16.8.1   →   16.8.6
react-dom                 16.8.1   →   16.8.6
react-router-dom           4.3.1   →    5.0.1
react-scripts              2.1.5   →    3.0.1
react-swipeable-views     0.13.1   →   0.13.3
eslint-config-prettier     4.0.0   →    4.3.0
eslint-plugin-prettier     3.0.1   →    3.1.0
@types/googlemaps        3.30.16   →   3.36.4
ajv                        6.9.1   →   6.10.0