feat(config): added shareable configuration jest/all (#276)

Author: nickineering

README.md

@@ -87,6 +87,21 @@ See
 [ESLint documentation](http://eslint.org/docs/user-guide/configuring#extending-configuration-files)
 for more information about extending configuration files.
 
+### All
+
+If you want to enable all rules instead of only some you can do so by adding the
+`all` configuration to your `.eslintrc` config file:
+
+```json
+{
+  "extends": ["plugin:jest/all"]
+}
+```
+
+While the `recommended` and `style` configurations only change in major versions
+the `all` configuration may change in any release and is thus unsuited for
+installations requiring long-term consistency.
+
 ## Rules
 
 | Rule                         | Description                                                       | Recommended      | Fixable             |

src/index.js

@@ -11,11 +11,22 @@ const rules = fs
     (acc, curr) => Object.assign(acc, { [curr]: require(`./rules/${curr}`) }),
     {},
   );
+let allRules = {};
+Object.keys(rules).forEach(function(key) {
+  allRules[`jest/${key}`] = 'error';
+});
 
 const snapshotProcessor = require('./processors/snapshot-processor');
 
 module.exports = {
   configs: {
+    all: {
+      plugins: ['jest'],
+      env: {
+        'jest/globals': true,
+      },
+      rules: allRules,
+    },
     recommended: {
       plugins: ['jest'],
       env: {