fix typo

Author: smhg

README.md

@@ -20,7 +20,7 @@ Parse a PO file with
 Where
 
   * **input** is a *po* file as a Buffer or an unicode string. Charset is converted to unicode from other encodings only if the input is a Buffer, otherwise the charset information is discarded
-  * **options** is an optional objects with the following optinal properties:
+  * **options** is an optional object with the following optinal properties:
     * **defaultCharset** is the charset to use if charset is not defined or is the default `"CHARSET"` (applies only if *input* is a Buffer)
     * **validation** is a flag to turn on PO source file validation. The validation makes sure that:
 
@@ -47,7 +47,7 @@ PO files can also be parsed from a stream source. After all input is processed t
 
 Where
 
-  * **options** is an optional objects, same as in `parse`. See [Parse PO files](#parse-po-files) section for details.
+  * **options** is an optional object, same as in `parse`. See [Parse PO files](#parse-po-files) section for details.
   * **transformOptions** are the standard stream options.
 
 **Example**