fix: lint errors

- Use eslint and replace standard
- Fix the lint errors

Author: thomson-t

.eslintrc.js

@@ -0,0 +1,31 @@
+module.exports = {
+  root: true,
+  parser: '@typescript-eslint/parser',
+  plugins: ['@typescript-eslint', 'prettier'],
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+    'prettier'
+  ],
+  rules: {
+    'object-curly-spacing': ['error', 'always'],
+    'prettier/prettier': 'error',
+    '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }]
+  },
+  env: {
+    node: true,
+    es6: true
+  },
+  parserOptions: {
+    ecmaVersion: 2020,
+    sourceType: 'module'
+  },
+  ignorePatterns: [
+    'lib/',
+    'sample/',
+    'android/',
+    'ios/',
+    '*.min.js',
+    'node_modules/'
+  ]
+}; 

.prettierrc.js

@@ -0,0 +1,11 @@
+module.exports = {
+  bracketSpacing: true,
+  singleQuote: true,
+  trailingComma: 'es5',
+  tabWidth: 2,
+  useTabs: false,
+  semi: true,
+  bracketSameLine: false,
+  arrowParens: 'avoid',
+  printWidth: 80
+};