Add missing period

Author: Planeshifter

lib/node_modules/@stdlib/array/pool/docs/types/index.d.ts

@@ -26,7 +26,7 @@ import ArrayBuffer = require( '@stdlib/array/buffer' );
 type DataType = 'float64' | 'float32' | 'int32' | 'uint32' | 'int16' | 'uint16' | 'int8' | 'uint8' | 'uint8c'; // tslint-disable-line max-line-length
 
 /**
-* Typed array or null
+* Typed array or null.
 */
 type TypedArrayOrNull = TypedArray | null;