Merge pull request #393 from microsoft/dependabot/pip/src/pillow-8.1.1

Bump pillow from 7.0.0 to 8.1.1 in /src

src/requirements.txt

@@ -6,7 +6,7 @@ pywin32==227; platform_system == "Windows"
 PyObjC; platform_system == "darwin"
 uflash==1.3.0
 adafruit-circuitpython-fancyled==1.3.3
-Pillow==7.0.0
+Pillow==8.1.1
 adafruit-circuitpython-bitmap_font==1.1.0
 adafruit-circuitpython-display-shapes==1.2.0
 adafruit-circuitpython-neopixel==5.0.0