Update php
Update php

Changes:

- https://github.com/docker-library/php/commit/b909ae3: Update to 7.2.21
- https://github.com/docker-library/php/commit/135204c: Update to 7.3.8
- https://github.com/docker-library/php/commit/b381c53: Merge pull request https://github.com/docker-library/php/pull/870 from infosiftr/s390x

infosiftr/stackbrew,docker-flink/official-images,docker-library/official-images,docker-solr/official-images,docker-library/official-images,infosiftr/stackbrew,thresheek/official-images,neo-technology/docker-official-images,31z4/official-images,docker-solr/official-images,docker-library/official-images,neo-technology/docker-official-images,31z4/official-images,docker-solr/official-images,dinogun/official-images,jperrin/official-images,docker-library/official-images,docker-library/official-images,31z4/official-images,31z4/official-images,thresheek/official-images,31z4/official-images,neo-technology/docker-official-images,jperrin/official-images,thresheek/official-images,infosiftr/stackbrew,neo-technology/docker-official-images,dinogun/official-images,docker-library/official-images,jperrin/official-images,neo-technology/docker-official-images,docker-flink/official-images,jperrin/official-images,neo-technology/docker-official-images,31z4/official-images,thresheek/official-images,jperrin/official-images,docker-solr/official-images,docker-flink/official-images,dinogun/official-images,docker-solr/official-images,31z4/official-images,dinogun/official-images,neo-technology/docker-official-images,thresheek/official-images,neo-technology/docker-official-images,infosiftr/stackbrew,31z4/official-images,thresheek/official-images,jperrin/official-images,docker-flink/official-images,jperrin/official-images,jperrin/official-images,dinogun/official-images,infosiftr/stackbrew,dinogun/official-images,infosiftr/stackbrew,docker-solr/official-images,docker-solr/official-images,docker-flink/official-images,docker-flink/official-images,neo-technology/docker-official-images,thresheek/official-images,jperrin/official-images,jperrin/official-images,docker-flink/official-images,docker-flink/official-images,thresheek/official-images,docker-library/official-images,infosiftr/stackbrew,docker-library/official-images,infosiftr/stackbrew,jperrin/official-images,docker-library/official-images,dinogun/official-images,31z4/official-images,docker-flink/official-images,neo-technology/docker-official-images,docker-solr/official-images,docker-library/official-images,infosiftr/stackbrew,docker-solr/official-images,docker-flink/official-images,infosiftr/stackbrew,jperrin/official-images,dinogun/official-images,thresheek/official-images,docker-solr/official-images,docker-flink/official-images,docker-flink/official-images,dinogun/official-images,31z4/official-images,dinogun/official-images,thresheek/official-images,31z4/official-images,neo-technology/docker-official-images,docker-solr/official-images,neo-technology/docker-official-images,thresheek/official-images,thresheek/official-images,docker-library/official-images,docker-library/official-images,jperrin/official-images,docker-solr/official-images,31z4/official-images,infosiftr/stackbrew,31z4/official-images,31z4/official-images,thresheek/official-images,infosiftr/stackbrew,docker-library/official-images,neo-technology/docker-official-images,infosiftr/stackbrew,docker-library/official-images,dinogun/official-images,infosiftr/stackbrew,dinogun/official-images,dinogun/official-images,docker-solr/official-images,neo-technology/docker-official-images,thresheek/official-images,docker-solr/official-images,docker-flink/official-images