chore(deps): update dependency wand to v0.6.1 (#3796)

Co-authored-by: Takashi Matsuo <[email protected]>

Author: renovate-bot

functions/imagemagick/requirements.txt

@@ -1,3 +1,3 @@
 google-cloud-vision==1.0.0
 google-cloud-storage==1.28.0
-Wand==0.5.9
+Wand==0.6.1

run/image-processing/requirements.txt

@@ -4,4 +4,4 @@ pytest==4.6.6; python_version < "3.0"
 gunicorn==20.0.4
 google-cloud-vision==1.0.0
 google-cloud-storage==1.28.0
-Wand==0.5.9
+Wand==0.6.1