Update adafruit_lc709203f.py

Adding an PackSize for the 2200 mAh Cylindrical battery: https://www.adafruit.com/product/1781

Author: edanidzerda

adafruit_lc709203f.py

@@ -112,6 +112,7 @@ class PackSize(CV):
         ("MAH500", 0x10, "500 mAh", 500),
         ("MAH1000", 0x19, "1000 mAh", 1000),
         ("MAH2000", 0x2D, "2000 mAh", 2000),
+        ("MAH2200", 0x2F, "2200 mAh", 2200),
         ("MAH3000", 0x36, "3000 mAh", 3000),
     )
 )