ci(setup): Add essential configs (#1)

Author: GZLiew

.eslintignore

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+node_modules
+coverage
+dist

.eslintrc

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+{
+  "extends": [
+    "eslint:recommended",
+    "airbnb-base",
+    "plugin:import/recommended",
+    "prettier"
+  ],
+  "plugins": ["prettier", "import"],
+  "parserOptions": {
+    "sourceType": "module",
+    "ecmaVersion": 2020
+  },
+  "env": {
+    "node": true
+  },
+  "rules": {
+    "no-console": ["off"],
+    "no-await-in-loop": ["off"],
+    "import/order": [
+      "error",
+      {
+        "newlines-between": "always",
+        "alphabetize": { "order": "asc", "caseInsensitive": true }
+      }
+    ],
+    "prettier/prettier": ["error"]
+  },
+  "overrides": [
+    {
+      "files": ["tests/**", "*.test.js", "*.spec.js"],
+      "env": {
+        "jest": true
+      }
+    }
+  ]
+}

.gitignore

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+node_modules
+coverage
+dist
+
+*.log
+

.lintstagedrc

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+{
+  "*.{js}": [
+    "eslint --quiet --fix"
+  ],
+  "*.{json,md,html}": [
+    "prettier --write"
+  ]
+}

.nvmrc

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+16.16.0

.prettierignore

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+node_modules
+coverage
+dist

.prettierrc

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+{
+  "singleQuote": true,
+  "semi": true,
+  "printWidth": 80,
+  "trailingComma": "none"
+}

LICENSE

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+MIT License
+
+Copyright (c) 2020 syJSdev
+
+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.

babel.config.js

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+module.exports = {
+  presets: [['@babel/preset-env', { targets: { node: 'current' } }]]
+};

jest.config.js

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+/*
+ * For a detailed explanation regarding each configuration property, visit:
+ * https://jestjs.io/docs/configuration
+ */
+
+module.exports = {
+  // Automatically clear mock calls, instances, contexts and results before every test
+  clearMocks: true,
+
+  // Indicates whether the coverage information should be collected while executing the test
+  collectCoverage: true,
+
+  // The directory where Jest should output its coverage files
+  coverageDirectory: 'coverage',
+
+  // A list of paths to directories that Jest should use to search for files in
+  roots: ['<rootDir>/src', '<rootDir>/tests'],
+
+  // Indicates whether each individual test should be reported during the run
+  verbose: true,
+
+  // An array of regexp patterns that are matched against all source file paths before re-running tests in watch mode
+  watchPathIgnorePatterns: [
+    '<rootDir>/tests/fixtures/build',
+    '<rootDir>/tests/fixtures/dist',
+    '<rootDir>/tests/fixtures/src/index.js'
+  ]
+};