Moved __future__ import to beginning of file

Author: radarhere

Tests/oss-fuzz/fuzz_font.py

@@ -1,5 +1,7 @@
 #!/usr/bin/python3
 
+from __future__ import annotations
+
 # Copyright 2020 Google LLC
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -13,7 +15,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-from __future__ import annotations
 
 
 import atheris