chore(deps): update docker.io/plugins/docker docker tag to v20.18.8

.drone.yml

@@ -66,7 +66,7 @@ steps:
   image: git.cryptic.systems/volker.raschek/git:1.4.0
 
 - name: build
-  image: docker.io/plugins/docker:20.18.6
+  image: docker.io/plugins/docker:20.18.8
   settings:
     auto_tag: false
     dockerfile: Dockerfile
@@ -131,7 +131,7 @@ steps:
   image: git.cryptic.systems/volker.raschek/git:1.4.0
 
 - name: build
-  image: docker.io/plugins/docker:20.18.6
+  image: docker.io/plugins/docker:20.18.8
   settings:
     auto_tag: false
     dockerfile: Dockerfile

Dockerfile

@@ -9,6 +9,8 @@ RUN pacman --sync --sysupgrade --refresh --noconfirm && \
       openssl \
       libyaml \
       python \
+      python-boto3 \
+      python-botocore \
       python-setuptools \
       python-pip \
       python-pytest \