Update requirements.txt with new dependency versions.

requirements.txt

-coverage==6.3.2
+coverage==6.5.0
 cycler==0.11.0
-fonttools==4.32.0
-kiwisolver==1.4.2
-matplotlib==3.5.2
+fonttools==4.38.0
+kiwisolver==1.4.4
+matplotlib==3.6.3
 myst-parser==0.18.0
-numpy==1.22.3
-packaging==21.3
-Pillow==9.3.0
-pyparsing==3.0.8
+numpy==1.24.2
+packaging==23.0
+Pillow==9.4.0
+pyparsing==3.0.9
 python-dateutil==2.8.2
-qrcode==7.3.1
+qrcode==7.4.2
 six==1.16.0
-Sphinx==5.0.2
-sphinx-autoapi==1.8.4
-sphinx-rtd-theme==1.0.0
+Sphinx==5.3.0
+sphinx-autoapi==2.0.1
+sphinx-rtd-theme==1.2.0