Initial commit

.editorconfig

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+# EditorConfig is awesome: https://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+[*]
+end_of_line = lf
+indent_style = space
+indent_size = 2
+charset = utf-8
+trim_trailing_whitespace = false
+insert_final_newline = true

.eslintrc.json

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+{
+  "env": {
+    "browser": true,
+    "es2021": true
+  },
+  "extends": [
+    "airbnb-base",
+    "airbnb-typescript/base"
+  ],
+  "parser": "@typescript-eslint/parser",
+  "parserOptions": {
+    "ecmaVersion": 12,
+    "sourceType": "module",
+    "project": "./tsconfig.json"
+  },
+  "plugins": [
+    "@typescript-eslint"
+  ],
+  "rules": {
+    "quotes": [
+      2,
+      "double"
+    ],
+    "no-unused-vars": "off",
+    "@typescript-eslint/no-unused-vars": [
+      "error"
+    ],
+    "import/prefer-default-export": "off",
+    "@typescript-eslint/lines-between-class-members": [
+      "error",
+      "always",
+      {
+        "exceptAfterSingleLine": true
+      }
+    ],
+    "no-constant-condition": "off",
+    "no-plusplus": "off",
+    "no-await-in-loop": "off",
+    "@typescript-eslint/return-await": "off",
+    "@typescript-eslint/quotes": [
+      2,
+      "double"
+    ],
+    "import/first": "off",
+    "max-len": "off",
+    "prefer-spread": "off",
+    "implicit-arrow-linebreak": [
+      "error",
+      "beside"
+    ]
+  }
+}

.gitignore

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+.vscode/*
+!.vscode/settings.json
+!.vscode/tasks.json
+!.vscode/launch.json
+!.vscode/extensions.json
+*.code-workspace
+
+# Local History for Visual Studio Code
+.history/
+node_modules/
+dist/

.vscode/launch.json

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+{
+  // Use IntelliSense to learn about possible attributes.
+  // Hover to view descriptions of existing attributes.
+  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+  "version": "0.2.0",
+  "configurations": [
+    {
+      "name": "Debug tests",
+      "request": "launch",
+      "runtimeArgs": ["run-script", "test"],
+      "runtimeExecutable": "npm",
+      "skipFiles": ["<node_internals>/**"],
+      "type": "pwa-node",
+      "console": "integratedTerminal"
+    }
+  ]
+}

jest.config.js

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+/** @type {import('ts-jest/dist/types').InitialOptionsTsJest} */
+module.exports = {
+  preset: "ts-jest",
+  testEnvironment: "node",
+  roots: ["./src/", "./test/"]
+};