Fix typo

Closes #153

Author: sindresorhus

index.d.ts

@@ -37,7 +37,7 @@ declare namespace meow {
 		- `alias`: Usually used to define a short flag alias.
 		- `default`: Default value when the flag is not specified.
 		- `isRequired`: Determine if the flag is required.
-			If it's only known at runtime whether the flag is requried or not you can pass a Function instead of a boolean, which based on the given flags and other non-flag arguments should decide if the flag is required.
+			If it's only known at runtime whether the flag is required or not you can pass a Function instead of a boolean, which based on the given flags and other non-flag arguments should decide if the flag is required.
 		- `isMultiple`: Indicates a flag can be set multiple times. Values are turned into an array. (Default: false)
 
 		@example

readme.md

@@ -138,7 +138,7 @@ The key is the flag name and the value is an object with any of:
 - `alias`: Usually used to define a short flag alias.
 - `default`: Default value when the flag is not specified.
 - `isRequired`: Determine if the flag is required. (Default: false)
-	- If it's only known at runtime whether the flag is requried or not, you can pass a `Function` instead of a `boolean`, which based on the given flags and other non-flag arguments, should decide if the flag is required. Two arguments are passed to the function:
+	- If it's only known at runtime whether the flag is required or not, you can pass a `Function` instead of a `boolean`, which based on the given flags and other non-flag arguments, should decide if the flag is required. Two arguments are passed to the function:
 	- The first argument is the **flags** object, which contains the flags converted to camel-case excluding aliases.
 	- The second argument is the **input** string array, which contains the non-flag arguments.
 	- The function should return a `boolean`, true if the flag is required, otherwise false.