Import tsconfig, eslint, eslint-plugin-prefer-let

[minkimcello]

Motivation

To combine @thefrontside/eslint-config, @thefrontside/tsconfig, and @cowboyd/eslint-plugin-prefer-let into a monorepo.

Approach

• Used lerna to import and maintain the commits of the three packages.
• Scoped eslint-plugin-prefer-let so that the package name is now @thefrontside/eslint-plugin-prefer-let.
• Removed travis from eslint-plugin-prefer-let because we'll be publishing from github actions.
• Added frontsidejack_npm_token to repo secrets.

TODOs

• Delete the three repositories once this is merged.

[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@mk_import ``` Or update your package.json file: ```bash { "@frontside/eslint-config": "mk_import" } ``` ---

@frontside/eslint-plugin-prefer-let

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

@frontside/tsconfig

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

Generated by :no_entry_sign: dangerJS against 63ae93de682c0e1a26dcb741c80c4daac2f9881e

[cowboyd]

We should probably create a bump release for these.