Upgrade various dependencies.

docs/Dockerfile

@@ -1,4 +1,4 @@
-FROM python:3.7.3-alpine3.10 as borgmatic
+FROM python:3.7.4-alpine3.10 as borgmatic
 
 COPY . /app
 RUN pip install --no-cache /app && generate-borgmatic-config && chmod +r /etc/borgmatic/config.yaml
@@ -7,7 +7,7 @@ RUN borgmatic --help > /command-line.txt \
            echo -e "\n--------------------------------------------------------------------------------\n" >> /command-line.txt \
            && borgmatic "$action" --help >> /command-line.txt; done
 
-FROM node:12.4.0-alpine as html
+FROM node:12.10.0-alpine as html
 
 WORKDIR /source
 
@@ -23,7 +23,7 @@ COPY . /source
 RUN npx eleventy --input=/source/docs --output=/output/docs \
   && mv /output/docs/index.html /output/index.html
 
-FROM nginx:1.16.0-alpine
+FROM nginx:1.16.1-alpine
 
 COPY --from=html /output /usr/share/nginx/html
 COPY --from=borgmatic /etc/borgmatic/config.yaml /usr/share/nginx/html/docs/reference/config.yaml

test_requirements.txt

@@ -4,21 +4,21 @@ attrs==19.1.0
 black==19.3b0; python_version >= '3.6'
 click==7.0
 colorama==0.4.1
-coverage==4.5.3
+coverage==4.5.4
 docopt==0.6.2
-flake8==3.7.7
+flake8==3.7.8
 flexmock==0.10.4
-isort==4.3.20
+isort==4.3.21
 mccabe==0.6.1
-more-itertools==7.0.0
-pluggy==0.12.0
+more-itertools==7.2.0
+pluggy==0.13.0
 py==1.8.0
 pycodestyle==2.5.0
 pyflakes==2.1.1
 pykwalify==1.7.0
-pytest==4.6.3
+pytest==5.1.2
 pytest-cov==2.7.1
 python-dateutil==2.8.0
-PyYAML==5.1.1
+PyYAML==5.1.2
 ruamel.yaml>0.15.0,<0.17.0
 toml==0.10.0