Added api reference for And and But methods (cucumber#1611)

* Added api reference for And and But methods

* Updated CHANGELOG.md

Author: silversonicaxel

CHANGELOG.md

@@ -22,6 +22,7 @@ Please see [CONTRIBUTING.md](https://github.com/cucumber/cucumber/blob/master/CO
 ### Fixed
 
 * Fix types for hook functions so they can return e.g. `'skipped'` ([#1542](https://github.com/cucumber/cucumber-js/pull/1542))
+* Fixed API reference for `And` and `But` methods ([#1611](https://github.com/cucumber/cucumber-js/pull/1611))
 
 ## [7.0.0] (2020-12-21)
 

docs/support_files/api_reference.md

@@ -46,6 +46,12 @@ Multiple `After` hooks are executed in the **reverse** order that they are defin
 
 ---
 
+#### `And(pattern[, options], fn)`
+
+Alias of `defineStep`.
+
+---
+
 #### `AfterAll([options,] fn)`
 
 Defines a hook which is run after all scenarios have completed.
@@ -101,6 +107,12 @@ Multiple `BeforeStep` hooks are executed in the order that they are defined.
 
 ---
 
+#### `But(pattern[, options], fn)`
+
+Alias of `defineStep`.
+
+---
+
 #### `defineStep(pattern[, options], fn)`
 
 Defines a step.