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Update README.md

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David Bomba 2019-07-09 19:43:24 +10:00 committed by GitHub
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@ -22,7 +22,7 @@ Where practical code should be strongly typed, ie your methods must return a typ
`public function doThis() : void`
PHP >= 7.1 allows the return type Nullable so there should be no circumstance a type cannot be return by using the following:
PHP >= 7.3 allows the return type Nullable so there should be no circumstance a type cannot be return by using the following:
`public function doThat() ?:string`