chore: Use ESLint. (#414)

Author: DylanVann

.eslintrc.js

@@ -0,0 +1,33 @@
+module.exports = {
+    parser: 'babel-eslint',
+    env: {
+        es6: true,
+    },
+    plugins: ['jest'],
+    overrides: {
+        files: 'src/**/*.test.js',
+        env: {
+            'jest/globals': true,
+        },
+    },
+    extends: [
+        'eslint:recommended',
+        'plugin:prettier/recommended',
+        'plugin:react/recommended',
+    ],
+    parserOptions: {
+        ecmaFeatures: {
+            jsx: true,
+        },
+        ecmaVersion: 2018,
+        sourceType: 'module',
+    },
+    rules: {
+        'react/prop-types': 'off',
+    },
+    settings: {
+        react: {
+            version: 'detect',
+        },
+    },
+}

package.json

@@ -25,7 +25,7 @@
         "build": "exit 0",
         "commit": "git-cz",
         "format": "yarn prettier --write",
-        "lint": "yarn prettier --list-different",
+        "lint": "eslint src/**/*.js react-native-fast-image-example/src/**/*.js",
         "prepare": "git submodule update --init --recursive",
         "semantic-release": "semantic-release",
         "test": "jest ./src/*.js",
@@ -43,12 +43,18 @@
         "@semantic-release/git": "^7.0.7",
         "@semantic-release/npm": "^5.1.3",
         "@semantic-release/release-notes-generator": "^7.1.4",
+        "babel-eslint": "^10.0.1",
         "babel-jest": "^24.1.0",
         "commitizen": "^3.0.5",
         "cz-conventional-changelog": "^2.1.0",
+        "eslint": "^5.14.1",
+        "eslint-config-prettier": "^4.0.0",
+        "eslint-plugin-jest": "^22.3.0",
+        "eslint-plugin-prettier": "^3.0.1",
+        "eslint-plugin-react": "^7.12.4",
         "jest": "^24.1.0",
         "metro-react-native-babel-preset": "0.48.1",
-        "prettier": "^1.15.3",
+        "prettier": "^1.16.4",
         "prettier-check": "^2.0.0",
         "prop-types": "^15.6.2",
         "react": "16.6.0-alpha.8af6728",