docs: added link to lint plugin (#157)

Author: benmonro

README.md

@@ -86,6 +86,11 @@ should be installed as one of your project's `devDependencies`:
 npm install --save-dev @testing-library/jest-dom
 ```
 
+> Note: We also recommend installing the jest-dom eslint plugin which provides auto-fixable lint rules 
+> that prevent false positive tests and improve test readability by ensuring you are using the right
+> matchers in your tests.  More details can be found at
+> [eslint-plugin-jest-dom](https://github.com/testing-library/eslint-plugin-jest-dom).
+
 ## Usage
 
 Import `@testing-library/jest-dom/extend-expect` once (for instance in your
@@ -1098,6 +1103,7 @@ expect(document.querySelector('.cancel-button')).toBeTruthy()
 > replacing `toBeInTheDOM` to read through the documentation of the proposed
 > alternatives to see which use case works better for your needs.
 
+
 ## Inspiration
 
 This whole library was extracted out of Kent C. Dodds' [DOM Testing