Update typescript and eslint-config

[minkimcello]

Motivation

I assumed by having frontside/eslint-config in the dependency of typescript we'd be able to extend from it but that does not seem to be the case.

Approach

~I added eslintrc.json to the frontside/typescript package to see if it'll allow me to install it to a different project and have its eslint be able to extend directly from frontside/typescript~ This didn't work.

This is a known issue and was requested as a feature of eslint but never actually implemented.

So I tried this monkey patch but that didn't work either.

I did the following the finish off this PR:

• [x] Removed eslint peer dependency in eslint-config. If you're installing eslint-config, you should have eslint. Why buy a car air freshner if you don't have a car?
• [x] Added eslint-config as peer dependency to typescript.
• [x] Added README.md to `typescript.
• [x] Patch bumped typescript to v1.0.1.
• [x] Patch bumped eslint-config to v1.1.2.
• [x] Removed .gitignore from sub-packages because there's one at the root of monorepo.

[github-actions[bot]]

The preview packages of this pull request have been published. Click on the following packages for instructions on how to install them:

@frontside/eslint-config

--- Install using the following command: ```bash $ npm install @frontside/eslint-config@typescript-upgrade ``` Or update your package.json file: ```bash { "@frontside/eslint-config": "typescript-upgrade" } ``` ---

eslint-plugin-prefer-let

--- Install using the following command: ```bash $ npm install eslint-plugin-prefer-let@typescript-upgrade ``` Or update your package.json file: ```bash { "eslint-plugin-prefer-let": "typescript-upgrade" } ``` ---

@frontside/typescript

--- Install using the following command: ```bash $ npm install @frontside/typescript@typescript-upgrade ``` Or update your package.json file: ```bash { "@frontside/typescript": "typescript-upgrade" } ``` ---

Generated by :no_entry_sign: dangerJS against 5eb4678fecab39746e4971e44939022e911fb918

[minkimcello]

@cowboyd Hmm it seems eslint can't reach in to grab eslint-config from frontside/typescript.

node_modules/
  @frontside/typescript/
    node_modules/
      @frontside/eslint-config/

.eslintrc.json // extends: @frontside/eslint-config 👎 

Should we then just make frontside/eslint-config a peer dependency?

[cowboyd]

It looks like this is a known issue https://github.com/eslint/eslint/issues/3458#issuecomment-594979168 and that there is both a formal solution in the works and that there are a number of workarounds that we might be able to use in the mean time.

[minkimcello]

@cowboyd @frontside/typescript: "1.0.0-2925c09" is the preview package that has a dependency of the eslint-config with the patch.