Use unicode in more places.  Fixes a problem with str8 + str in test.
diff --git a/Modules/_sqlite/module.c b/Modules/_sqlite/module.c
index 4525c61..61ac0a1 100644
--- a/Modules/_sqlite/module.c
+++ b/Modules/_sqlite/module.c
@@ -359,13 +359,13 @@
         Py_DECREF(tmp_obj);
     }
 
-    if (!(tmp_obj = PyString_FromString(PYSQLITE_VERSION))) {
+    if (!(tmp_obj = PyUnicode_FromString(PYSQLITE_VERSION))) {
         goto error;
     }
     PyDict_SetItemString(dict, "version", tmp_obj);
     Py_DECREF(tmp_obj);
 
-    if (!(tmp_obj = PyString_FromString(sqlite3_libversion()))) {
+    if (!(tmp_obj = PyUnicode_FromString(sqlite3_libversion()))) {
         goto error;
     }
     PyDict_SetItemString(dict, "sqlite_version", tmp_obj);