Update eslint and prettier

Update eslint, prettier, and related packages.

eslint is updated to 7.2 (7.3 is latest) due to compatibility
issue with latest eslint-config-airbnb.

Add some additional overrides to the eslint and prettier configs
to maintain our existing ruleset and minimise changes. We can
roll out the new defaults in a separate change if we want
(several hundred lines of change).

.eslintrc.js

@@ -1,47 +1,62 @@
+/*
+Copyright 2019-2020 The Tekton Authors
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
 module.exports = {
-  "parser": "babel-eslint",
-  "env": {
-      "browser": true,
-      "es6": true,
-      "jest": true,
-      "node": true
+  parser: 'babel-eslint',
+  env: {
+    browser: true,
+    es6: true,
+    jest: true,
+    node: true
   },
-  "extends": [
-    "airbnb",
-    "plugin:prettier/recommended",
-    "prettier/react"
-  ],
-  "globals": {
-      "Atomics": "readonly",
-      "SharedArrayBuffer": "readonly"
+  extends: ['airbnb', 'plugin:prettier/recommended', 'prettier/react'],
+  globals: {
+    Atomics: 'readonly',
+    SharedArrayBuffer: 'readonly'
   },
-  "parserOptions": {
-      "ecmaFeatures": {
-          "jsx": true
-      },
-      "ecmaVersion": 2018,
-      "sourceType": "module"
+  parserOptions: {
+    ecmaFeatures: {
+      jsx: true
+    },
+    ecmaVersion: 2018,
+    sourceType: 'module'
   },
-  "plugins": [
-      "notice",
-      "react"
-  ],
-  "rules": {
-    "curly": ["error", "all"],
-    "import/prefer-default-export": "off",
-    "import/no-extraneous-dependencies": "off",
-    "jsx-a11y/anchor-is-valid": "off",
-    "no-case-declarations": "off",
-    "no-template-curly-in-string": "off",
-    "notice/notice": [
-      "error", { "templateFile": "config_frontend/copyright.txt", nonMatchingTolerance: 0.95 }
+  plugins: ['notice', 'react'],
+  rules: {
+    curly: ['error', 'all'],
+    'import/prefer-default-export': 'off',
+    'import/no-extraneous-dependencies': 'off',
+    'jsx-a11y/anchor-is-valid': 'off',
+    'no-case-declarations': 'off',
+    'no-template-curly-in-string': 'off',
+    'notice/notice': [
+      'error',
+      {
+        templateFile: 'config_frontend/copyright.txt',
+        nonMatchingTolerance: 0.95
+      }
     ],
-    "react/jsx-filename-extension": "off",
-    "react/destructuring-assignment": "off",
-    "react/prop-types": "off",
-    "sort-imports": ["error", {
-        "ignoreCase": true,
-        "ignoreDeclarationSort": true
-    }]
+    'react/destructuring-assignment': 'off',
+    'react/jsx-curly-newline': 'off',
+    'react/jsx-filename-extension': 'off',
+    'react/jsx-props-no-spreading': 'off',
+    'react/prop-types': 'off',
+    'react/state-in-constructor': 'off',
+    'sort-imports': [
+      'error',
+      {
+        ignoreCase: true,
+        ignoreDeclarationSort: true
+      }
+    ]
   }
 };

.prettierrc

@@ -1,4 +1,5 @@
 {
+  "arrowParens": "avoid",
   "singleQuote": true,
   "trailingComma": "none"
 }