Update documentation

CHANGELOG.md

@@ -12,6 +12,8 @@ This document is formatted according to the principles of [Keep A CHANGELOG](htt
 
 ### Added
 
+* Support for step definitions without return ([364](https://github.com/cucumber/godog/pull/364) -[titouanfreville])
+
 ### Changed
 
 * Upgraded gherkin-go to v19 ([402](https://github.com/cucumber/godog/pull/402) - [mbow])

README.md

@@ -210,6 +210,14 @@ Feature: eat godogs
 
 You may change **return godog.ErrPending** to **return nil** in the three step definitions and the scenario will pass successfully.
 
+Also, you may omit error return if your step does not fail.
+
+```go
+func iEat(arg1 int) {
+	// Eat arg1.
+}
+```
+
 #### Step 5 - Create the main program to test
 
 We only need a number of **godogs** for now. Lets keep it simple.