CircleCI: update docker versions used in CI

CircleCI now has 19.03; https://circleci.com/docs/2.0/building-docker-images/#docker-version

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 41255a4315d2067dba7d36b4926d0cd79da90724)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Upstream-commit: d0b65608819cf442e70b1e802b0a050a958ebbc1
Component: cli

Author: thaJeztah

components/cli/circle.yml

@@ -4,13 +4,13 @@ jobs:
 
   lint:
     working_directory: /work
-    docker: [{image: 'docker:18.09-git'}]
+    docker: [{image: 'docker:19.03-git'}]
     environment:
       DOCKER_BUILDKIT: 1
     steps:
       - checkout
       - setup_remote_docker:
-          version: 18.09.3
+          version: 19.03.8
           reusable: true
           exclusive: false
       - run:
@@ -39,14 +39,14 @@ jobs:
 
   cross:
     working_directory: /work
-    docker: [{image: 'docker:18.09-git'}]
+    docker: [{image: 'docker:19.03-git'}]
     environment:
       DOCKER_BUILDKIT: 1
     parallelism: 3
     steps:
       - checkout
       - setup_remote_docker:
-          version: 18.09.3
+          version: 19.03.8
           reusable: true
           exclusive: false
       - run:
@@ -75,13 +75,13 @@ jobs:
 
   test:
     working_directory: /work
-    docker: [{image: 'docker:18.09-git'}]
+    docker: [{image: 'docker:19.03-git'}]
     environment:
       DOCKER_BUILDKIT: 1
     steps:
       - checkout
       - setup_remote_docker:
-          version: 18.09.3
+          version: 19.03.8
           reusable: true
           exclusive: false
       - run:
@@ -122,13 +122,13 @@ jobs:
 
   validate:
     working_directory: /work
-    docker: [{image: 'docker:18.09-git'}]
+    docker: [{image: 'docker:19.03-git'}]
     environment:
       DOCKER_BUILDKIT: 1
     steps:
       - checkout
       - setup_remote_docker:
-          version: 18.09.3
+          version: 19.03.8
           reusable: true
           exclusive: false
       - run: