made move public

Author: aman-godara

src/stdlib_string_type.fypp

@@ -22,7 +22,7 @@ module stdlib_string_type
     public :: string_type
     public :: len, len_trim, trim, index, scan, verify, repeat, adjustr, adjustl
     public :: lgt, lge, llt, lle, char, ichar, iachar
-    public :: to_lower, to_upper, to_title, to_sentence, reverse
+    public :: to_lower, to_upper, to_title, to_sentence, reverse, move
     public :: assignment(=)
     public :: operator(>), operator(>=), operator(<), operator(<=)
     public :: operator(==), operator(/=), operator(//)