fix(parse): bug where args aren't null terminated

src/parse.c

@@ -19,6 +19,7 @@ void add_arg(struct Args *args, char *arg_ptr, unsigned int arg_length) {
 
   char *arg = malloc(arg_length + 1);
   strncpy(arg, arg_ptr, arg_length);
+  arg[arg_length] = '\0';
 
   args->argv[args->argc] = arg;
   args->argc++;