Initial commit

.eslintignore

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+\.eslintrc.js
+dist/

.eslintrc.js

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+module.exports = {
+  env: {
+    node: true,
+    jest: true,
+  },
+  parser: "@typescript-eslint/parser",
+  parserOptions: {
+    project: "./tsconfig.json",
+  },
+  plugins: ["@typescript-eslint"],
+  extends: [
+    "eslint:recommended",
+    "plugin:@typescript-eslint/recommended",
+    "plugin:@typescript-eslint/recommended-requiring-type-checking",
+    "prettier",
+  ],
+  rules: {
+    semi: ["error"],
+    "@typescript-eslint/explicit-function-return-type": [
+      "error",
+      { allowExpressions: false },
+    ],
+  },
+};

.github/workflows/lint.yml

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+name: lint
+on: [pull-request]
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup Node.js environment
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.17.5
+      - name: Install npm packages
+        run: npm ci
+      - name: Check lint
+        run: npm run lint

.github/workflows/test.yml

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+name: test
+on: [pull-request]
+jobs:
+  check:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup Node.js environment
+        uses: actions/setup-node@v1
+        with:
+          node-version: 14.17.5
+      - name: Install npm packages
+        run: npm ci
+      - name: Run test
+        run: npm run test

.gitignore

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+node_modules/
+dist/

.node-version

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+14.17.5

.prettierignore

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+dist/

LICENSE

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+MIT License
+
+Copyright (c) 2021 Ryo Ochiai
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

jest.config.ts

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+module.exports = {
+  roots: ["<rootDir>/src"],
+  testMatch: ["**/*.test.ts"],
+  transform: { "^.+\\.ts$": "ts-jest" },
+};