Merge #71

71: Update pillow to 8.1.0 r=duckinator a=pyup-bot


This PR updates [pillow](https://pypi.org/project/pillow) from **8.0.1** to **8.1.0**.



<details>
  <summary>Changelog</summary>
  
  
   ### 8.1.0
   ```
   ------------------

- Fix TIFF OOB Write error. CVE-2020-35654 5175
  [wiredfool]

- Fix for Read Overflow in PCX Decoding. CVE-2020-35653 5174
  [wiredfool, radarhere]

- Fix for SGI Decode buffer overrun. CVE-2020-35655 5173
  [wiredfool, radarhere]

- Fix OOB Read when saving GIF of xsize=1 5149
  [wiredfool]

- Makefile updates 5159
  [wiredfool, radarhere]

- Add support for PySide6 5161
  [hugovk]

- Use disposal settings from previous frame in APNG 5126
  [radarhere]

- Added exception explaining that _repr_png_ saves to PNG 5139
  [radarhere]

- Use previous disposal method in GIF load_end 5125
  [radarhere]

- Allow putpalette to accept 1024 integers to include alpha values 5089
  [radarhere]

- Fix OOB Read when writing TIFF with custom Metadata 5148
  [wiredfool]

- Added append_images support for ICO 4568
  [ziplantil, radarhere]

- Block TIFFTAG_SUBIFD 5120
  [radarhere]

- Fixed dereferencing potential null pointers 5108, 5111
  [cgohlke, radarhere]

- Deprecate FreeType 2.7 5098
  [hugovk, radarhere]

- Moved warning to end of execution 4965
  [radarhere]

- Removed unused fromstring and tostring C methods 5026
  [radarhere]

- init() if one of the formats is unrecognised 5037
  [radarhere]

- Moved string_dimension CVE image to pillow-depends 4993
  [radarhere]

- Support raw rgba8888 for DDS 4760
  [qiankanglai]
   ```
   
  
</details>


 

<details>
  <summary>Links</summary>
  
  - PyPI: https://pypi.org/project/pillow
  - Changelog: https://pyup.io/changelogs/pillow/
  - Homepage: https://python-pillow.org
</details>



Co-authored-by: pyup-bot <github-bot@pyup.io>

requirements.txt

@@ -2,5 +2,5 @@ cherrypy==18.6.0
 jinja2==2.11.2
 gunicorn==20.0.4
 eventlet==0.30.0
-pillow==8.0.1
+pillow==8.1.0
 elasticsearch>=7.7.0,<8.0.0