chore(release): 2.0.0 [skip ci]

# [2.0.0](https://gitlab.com/to-be-continuous/docker/compare/1.2.3...2.0.0) (2021-09-02)

### Features

* Change boolean variable behaviour ([f74d9ef2](https://gitlab.com/to-be-continuous/docker/commit/f74d9ef2de5b4dc204b519e14c47862ea2b73b33)

)

### BREAKING CHANGES

* boolean variable now triggered on explicit 'true' value

Signed-off-by: Cédric OLIVIER <cedric3.olivier@orange.com>

README.md

@@ -9,7 +9,7 @@ In order to include this template in your project, add the following to your `.g
 ```yaml
 include:
   - project: 'to-be-continuous/docker'
-    ref: '1.2.3'
+    ref: '2.0.0'
     file: '/templates/gitlab-ci-docker.yml'
 ```
 
@@ -307,7 +307,7 @@ Here is a `.gitlab-ci.yaml` using an external Docker registry:
 ```yaml
 include:
   - project: 'to-be-continuous/docker'
-    ref: '1.2.3'
+    ref: '2.0.0'
     file: '/templates/gitlab-ci-docker.yml'
 
 variables:
@@ -325,7 +325,7 @@ Here is a `.gitlab-ci.yaml` that builds 2 Docker images from the same project (u
 ```yaml
 include:
   - project: 'to-be-continuous/docker'
-    ref: '1.2.3'
+    ref: '2.0.0'
     file: '/templates/gitlab-ci-docker.yml'
 
 variables:

templates/gitlab-ci-docker.yml

@@ -367,7 +367,7 @@ stages:
     fi
   }
 
-  if [[ "$TEMPLATE_CHECK_UPDATE_DISABLED" != "true" ]]; then check_for_update docker "1.2.3"; fi
+  if [[ "$TEMPLATE_CHECK_UPDATE_DISABLED" != "true" ]]; then check_for_update docker "2.0.0"; fi
   init_workspace
 
   # ENDSCRIPT
@@ -375,7 +375,7 @@ stages:
 .docker-base:
   services:
     - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
-      command: ["--service", "docker", "1.2.3"]
+      command: ["--service", "docker", "2.0.0"]
   before_script:
     - *docker-scripts
 
@@ -404,7 +404,7 @@ stages:
     _TRACE: "${TRACE}"
   services:
     - name: "$CI_REGISTRY/to-be-continuous/tools/tracking:master"
-      command: ["--service", "docker", "1.2.3"]
+      command: ["--service", "docker", "2.0.0"]
     - name: $DOCKER_DIND_IMAGE
       alias: docker
       command: