Update pkgs & versions used in recent dev env

Drop -e spec of salishsea-site pkg so that GitHub Dependabot service can
fully inspect dependencies and generate automatic PRs for security updates.

requirements.txt

@@ -8,75 +8,74 @@
 #   (salishsea-site)$ python3 -m pip list --format=freeze >> requirements.txt
 
 alabaster==0.7.12
-appdirs==1.4.3
-arrow==0.15.7
-attrs==19.3.0
-Babel==2.8.0
-black==19.10b0
-certifi==2020.6.20
-cffi==1.14.0
-chardet==3.0.4
-click==7.1.1
-coverage==5.1
-cryptography==2.8
+appdirs==1.4.4
+arrow==0.17.0
+attrs==20.3.0
+Babel==2.9.0
+black==20.8b1
+brotlipy==0.7.0
+certifi==2020.12.5
+cffi==1.14.4
+chardet==4.0.0
+click==7.1.2
+colorama==0.4.4
+coverage==5.3.1
+cryptography==3.3.1
 docutils==0.16
 hupper==1.10.2
-idna==2.9
+idna==2.10
 imagesize==1.2.0
-importlib-metadata==1.6.0
+iniconfig==1.1.1
 Jinja2==2.11.2
-Mako==1.1.2
+Mako==1.1.4
 MarkupSafe==1.1.1
-more-itertools==8.2.0
+more-itertools==8.6.0
 mypy-extensions==0.4.3
-packaging==20.1
-PasteDeploy==2.1.0
-pathspec==0.8.0
-pip==20.1.1
+packaging==20.8
+PasteDeploy==2.1.1
+pathspec==0.8.1
+pip==20.3.3
 plaster==1.0
 plaster-pastedeploy==0.7
 pluggy==0.13.1
-py==1.8.1
+py==1.10.0
 pycparser==2.20
-Pygments==2.6.1
-pyOpenSSL==19.1.0
+Pygments==2.7.4
+pyOpenSSL==20.0.1
 pyparsing==2.4.7
-pyramid==1.10.4
-pyramid-debugtoolbar==4.6.1
+pyramid==1.10.5
+pyramid-debugtoolbar==4.9
 pyramid-mako==1.1.0
 PySocks==1.7.1
-pytest==5.4.3
-pytest-cov==2.10.0
+pytest==6.2.1
+pytest-cov==2.10.1
 python-dateutil==2.8.1
-pytz==2019.3
+pytz==2020.5
 PyYAML==5.3.1
-regex==2020.4.4
+regex==2020.11.13
 repoze.lru==0.7
-requests==2.24.0
--e salishsea-site==20.1.dev0
-sentry-sdk==0.15.1
-setuptools==46.1.3.post20200325
-six==1.14.0
+requests==2.25.1
+sentry-sdk==0.19.5
+setuptools==49.6.0.post20210108
+six==1.15.0
 snowballstemmer==2.0.0
-Sphinx==3.1.1
-sphinx-rtd-theme==0.5.0
+Sphinx==3.4.3
+sphinx-rtd-theme==0.5.1
 sphinxcontrib-applehelp==1.0.2
 sphinxcontrib-devhelp==1.0.2
 sphinxcontrib-htmlhelp==1.0.3
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.4
-supervisor==4.2.0
-toml==0.10.0
-translationstring==1.3
-typed-ast==1.4.1
-typing-extensions==3.7.4.1
-urllib3==1.25.8
+supervisor==4.2.1
+toml==0.10.2
+translationstring==1.4
+typed-ast==1.4.2
+typing-extensions==3.7.4.3
+urllib3==1.26.2
 venusian==3.0.0
 waitress==1.4.4
-wcwidth==0.1.9
 WebOb==1.8.6
-wheel==0.34.2
-zipp==3.1.0
+wheel==0.36.2
 zope.deprecation==4.4.0
-zope.interface==5.1.0
+zope.interface==5.2.0