Upgraded Typescript to 3.6.3

[tmkn]

This PR updates TypeScript to 3.6.3.

The improved typechecking of 3.6 highlighted 2 issues.
1 was easy to fix by using built in types, the 2nd one was a little more delicate as the material ui typings are not great/wrong.

Namely the withWidth hoc. Due to the way the typings where written they show up as optional properties on the component itself. So when you instantiate the component you can optionally pass in a width prop. Which of course doesn't make sense since it is injected by the hoc automatically.

This behaviour makes it so that inside your component width has the type Breakpoint | undefined ._.
As such you can't directly pass it on to isWidthUp('sm', width) as it expects Breakpoint but as said the hoc prop is (incorrectly) typed as Breakpoint | undefined. This needs to be fixed in material ui.

So for the time being I had to overrule the compiler and disable the eslint no null assertion test for this line to fix the wrong hoc width prop type from material ui: sWidthUp('sm', width!).
Since I saw other places where eslint rules where occasionally disabled I felt confident to also do it here rather than to do an explicit null check in the code (Since there is nothing wrong with the actual code to begin with).

I also needed to add @typescript-eslint/parser as the parser for eslint
The default parser(espree) only supports typescript < 3.6. . @typescript-eslint/parser in the meantime is now the preferred parser for typescript.

e: I also added a setting for vscode so that it uses the typescript version from the package.json rather than the built in from vscode.

[codecov-io]

Codecov Report

Merging #145 into master will not change coverage.
The diff coverage is 0%.

@@           Coverage Diff           @@
##           master     #145   +/-   ##
=======================================
  Coverage   84.12%   84.12%           
=======================================
  Files          92       92           
  Lines         926      926           
  Branches      166      151   -15     
=======================================
  Hits          779      779           
- Misses        128      132    +4     
+ Partials       19       15    -4

Impacted Files	Coverage Δ
src/components/Search/Search.tsx	100% <ø> (ø)	⬆️
src/components/NotFound/NotFound.tsx	46.15% <0%> (ø)	⬆️
src/components/Header/Header.tsx	89.47% <0%> (ø)	⬆️
src/components/Install/Install.tsx	83.33% <0%> (ø)	⬆️
src/components/DetailSidebar/DetailSidebar.tsx	89.47% <0%> (ø)	⬆️
...mponents/RegistryInfoDialog/RegistryInfoDialog.tsx	66.66% <0%> (ø)	⬆️

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[juanpicado]

nice job ! 🚀

[juanpicado]

Great explanation @tmkn