Fix typing annotations for python 3.8

Queue does not accept type annotations and the tests running pytest was failing with
```
python -m pytest
...
opensfm/features_processing.py:19: in <module>
    ProcessQueue = queue.Queue[
E   TypeError: 'type' object is not subscriptable
...
```

Similar problem for networkx EdgeView

Author: paulinus

opensfm/features_processing.py

@@ -1,9 +1,10 @@
-# pyre-unsafe
+# pyre-strict
 import itertools
 import logging
 import math
 import queue
 import threading
+import sys
 from timeit import default_timer as timer
 from typing import Any, Dict, List, Optional, Tuple
 
@@ -16,6 +17,26 @@
 logger: logging.Logger = logging.getLogger(__name__)
 
 
+if sys.version_info >= (3, 9):
+    ProcessQueue = queue.Queue[
+        Optional[
+            Tuple[str, "NDArray", Optional["NDArray"], Optional["NDArray"], DataSetBase, bool]
+        ]
+    ]
+else:
+    ProcessQueue = queue.Queue
+
+ProducerArgs = Tuple[
+    ProcessQueue,
+    DataSetBase,
+    List[str],
+    "Counter",
+    int,
+    bool,
+]
+ConsumerArgs = ProcessQueue
+
+
 def run_features_processing(data: DataSetBase, images: List[str], force: bool) -> None:
     """Main entry point for running features extraction on a list of images."""
     default_queue_size = 10

opensfm/large/tools.py

@@ -1,4 +1,5 @@
-# pyre-unsafe
+# pyre-strict
+from __future__ import annotations
 import itertools
 import logging
 from collections import namedtuple