docker base image ..bionic -> 11-jre-hotspot-focal

Update from  11-jre-hotspot-bionic to 11-jre-hotspot-focal, since that
image is just 3 months old instead of >1year for the bionic image.

That also allows to install newer dependencies, e.g. the python is no
current enough to support swh.scanner, and also the dependencies of tern
are now available.

Signed-off-by: Maximilian Huber <gh@maxhbr.de>

Dockerfile

@@ -53,13 +53,13 @@ RUN --mount=type=cache,target=/tmp/.gradle/ \
     sed -i -r '/distributionSha256Sum=[0-9a-f]{64}/d' gradle/wrapper/gradle-wrapper.properties && \
     ./gradlew --no-daemon --stacktrace -Pversion=$ORT_VERSION :cli:distTar :helper-cli:startScripts
 
-FROM adoptopenjdk:11-jre-hotspot-bionic
+FROM adoptopenjdk:11-jre-hotspot-focal
 
 ENV \
     # Package manager versions.
     BOWER_VERSION=1.8.8 \
-    CARGO_VERSION=0.54.0-0ubuntu1~18.04.1 \
-    COMPOSER_VERSION=1.6.3-1 \
+    CARGO_VERSION=0.54.0-0ubuntu1~20.04.1 \
+    COMPOSER_VERSION=1.10.1-1 \
     CONAN_VERSION=1.43.2 \
     GO_DEP_VERSION=0.5.4 \
     GO_VERSION=1.16.5 \
@@ -112,7 +112,6 @@ RUN --mount=type=cache,target=/var/cache/apt --mount=type=cache,target=/var/lib/
         composer=$COMPOSER_VERSION \
         nodejs \
         python-dev \
-        python-pip \
         python-setuptools \
         python3-dev \
         python3-pip \