docs(readme): update Jest section

README.md

@@ -29,7 +29,7 @@ SVGR is an MIT-licensed open source project. It's an independent project with on
 
 ### Gold Sponsors
 
-Gold Sponsors are those who have pledged $200/month and more to SVGR.
+Gold Sponsors are those who have pledged \$200/month and more to SVGR.
 
 [![gold-sponsors](https://opencollective.com/svgr/tiers/gold-sponsors.svg?avatarHeight=120&width=600)](https://opencollective.com/svgr/order/6010)
 
@@ -39,24 +39,35 @@ Gold Sponsors are those who have pledged $200/month and more to SVGR.
 
 ```html
 <?xml version="1.0" encoding="UTF-8"?>
-<svg width="48px" height="1px" viewBox="0 0 48 1" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-    <!-- Generator: Sketch 46.2 (44496) - http://www.bohemiancoding.com/sketch -->
-    <title>Rectangle 5</title>
-    <desc>Created with Sketch.</desc>
-    <defs></defs>
-    <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
-        <g id="19-Separator" transform="translate(-129.000000, -156.000000)" fill="#063855">
-            <g id="Controls/Settings" transform="translate(80.000000, 0.000000)">
-                <g id="Content" transform="translate(0.000000, 64.000000)">
-                    <g id="Group" transform="translate(24.000000, 56.000000)">
-                        <g id="Group-2">
-                            <rect id="Rectangle-5" x="25" y="36" width="48" height="1"></rect>
-                        </g>
-                    </g>
-                </g>
+<svg
+  width="48px"
+  height="1px"
+  viewBox="0 0 48 1"
+  version="1.1"
+  xmlns="http://www.w3.org/2000/svg"
+  xmlns:xlink="http://www.w3.org/1999/xlink"
+>
+  <!-- Generator: Sketch 46.2 (44496) - http://www.bohemiancoding.com/sketch -->
+  <title>Rectangle 5</title>
+  <desc>Created with Sketch.</desc>
+  <defs></defs>
+  <g id="Page-1" stroke="none" stroke-width="1" fill="none" fill-rule="evenodd">
+    <g
+      id="19-Separator"
+      transform="translate(-129.000000, -156.000000)"
+      fill="#063855"
+    >
+      <g id="Controls/Settings" transform="translate(80.000000, 0.000000)">
+        <g id="Content" transform="translate(0.000000, 64.000000)">
+          <g id="Group" transform="translate(24.000000, 56.000000)">
+            <g id="Group-2">
+              <rect id="Rectangle-5" x="25" y="36" width="48" height="1"></rect>
             </g>
+          </g>
         </g>
+      </g>
     </g>
+  </g>
 </svg>
 ```
 
@@ -208,6 +219,7 @@ If you use `@svgr/webpack`, importing `.svg` files in Jest could break your code
 ```js
 // __mocks__/svgMock.js
 module.exports = 'SvgMock'
+module.exports.ReactComponent = 'SvgMock'
 ```
 
 ```js