Update Python dependencies

Author: mdmintz

requirements.txt

@@ -10,6 +10,7 @@ setuptools-scm>=6.0.1;python_version>="3.6"
 wheel>=0.36.2
 attrs>=21.2.0
 PyYAML>=5.4.1;python_version>="3.6"
+sortedcontainers==2.4.0
 certifi>=2020.12.5
 six==1.16.0
 nose==1.3.7
@@ -64,7 +65,7 @@ traitlets==5.0.5;python_version>="3.7"
 prompt-toolkit==1.0.18;python_version<"3.6"
 prompt-toolkit==3.0.18;python_version>="3.6"
 decorator==4.4.2;python_version<"3.5"
-decorator==5.0.7;python_version>="3.5"
+decorator==5.0.9;python_version>="3.5"
 ipython==5.10.0;python_version<"3.5"
 ipython==6.5.0;python_version>="3.5" and python_version<"3.6"
 ipython==7.16.1;python_version>="3.6" and python_version<"3.7"
@@ -83,7 +84,7 @@ toml==0.10.2
 Pillow==6.2.2;python_version<"3.5"
 Pillow==7.2.0;python_version>="3.5" and python_version<"3.6"
 Pillow==8.2.0;python_version>="3.6"
-rich==10.2.0;python_version>="3.6" and python_version<"4.0"
+rich==10.2.1;python_version>="3.6" and python_version<"4.0"
 tornado==5.1.1;python_version<"3.5"
 tornado==6.1;python_version>="3.5"
 pdfminer.six==20191110;python_version<"3.5"
@@ -93,7 +94,7 @@ pdfminer.six==20201018;python_version>="3.5"
 # ("pip install -r requirements.txt" also installs this, but "pip install -e ." won't.)
 
 coverage==5.5
-pytest-cov==2.11.1
+pytest-cov==2.12.0
 flake8==3.7.9;python_version<"3.5"
 flake8==3.9.2;python_version>="3.5"
 pyflakes==2.1.1;python_version<"3.5"

setup.py

@@ -125,6 +125,7 @@
         "wheel>=0.36.2",
         "attrs>=21.2.0",
         'PyYAML>=5.4.1;python_version>="3.6"',
+        "sortedcontainers==2.4.0",
         "certifi>=2020.12.5",
         "six==1.16.0",
         "nose==1.3.7",
@@ -179,7 +180,7 @@
         'prompt-toolkit==1.0.18;python_version<"3.6"',
         'prompt-toolkit==3.0.18;python_version>="3.6"',
         'decorator==4.4.2;python_version<"3.5"',
-        'decorator==5.0.7;python_version>="3.5"',
+        'decorator==5.0.9;python_version>="3.5"',
         'ipython==5.10.0;python_version<"3.5"',
         'ipython==6.5.0;python_version>="3.5" and python_version<"3.6"',
         'ipython==7.16.1;python_version>="3.6" and python_version<"3.7"',
@@ -198,7 +199,7 @@
         'Pillow==6.2.2;python_version<"3.5"',
         'Pillow==7.2.0;python_version>="3.5" and python_version<"3.6"',
         'Pillow==8.2.0;python_version>="3.6"',
-        'rich==10.2.0;python_version>="3.6" and python_version<"4.0"',
+        'rich==10.2.1;python_version>="3.6" and python_version<"4.0"',
         'tornado==5.1.1;python_version<"3.5"',
         'tornado==6.1;python_version>="3.5"',
         'pdfminer.six==20191110;python_version<"3.5"',
@@ -208,7 +209,7 @@
         # pip install -e .[coverage]
         "coverage": [
             "coverage==5.5",
-            "pytest-cov==2.11.1",
+            "pytest-cov==2.12.0",
         ],
         # pip install -e .[flake]
         "flake": [