Upgrade Bundler from 1.17.2 to 2.1.4

https://gitlab.com/gitlab-org/gitlab-shell/-/merge_requests/426
https://gitlab.com/groups/gitlab-org/-/epics/2380

Signed-off-by: Takuya Noguchi <[email protected]>

Author: tnir

.gitlab-ci.yml

@@ -38,7 +38,7 @@ default:
     - apt-get update -qq && apt-get install -y ruby ruby-dev
     - ruby -v
     - export PATH=~/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/go/bin
-    - gem install --force --bindir /usr/local/bin bundler -v 1.17.2
+    - gem install --force --bindir /usr/local/bin bundler -v 2.1.4
     - bundle install
     # Now set up to run the Golang tests
     - make build
@@ -87,4 +87,4 @@ gemnasium-dependency_scanning:
   rules: *workflow_rules
 
 bundler-audit-dependency_scanning:
-  rules: *workflow_rules
+  rules: *workflow_rules

Gemfile.lock

@@ -41,4 +41,4 @@ DEPENDENCIES
   rubocop (= 0.49.1)
 
 BUNDLED WITH
-   1.17.2
+   2.1.4