Merge pull request #97 from awordforthat/issue82/update-gps-docs-amend

use values for satellite dict access instead of items

adafruit_gps.py

@@ -699,7 +699,7 @@ def _parse_gsv(self, talker: bytes, data: List[str]) -> bool:
                     # been seen for 30 seconds
                     timestamp = time.monotonic()
                     old = []
-                    for sat in self.sats.items():
+                    for sat in self.sats.values():
                         if (timestamp - sat[4]) > 30:
                             old.append(i)
                     for i in old: