Update prettier (major version upgrade)

In order to keep the diff small we are (temporarily adding) a lot of
files in spec/ and ee/spec/ into our .prettierignore

.prettierignore

@@ -9,3 +9,137 @@ doc/api/graphql/reference/gitlab_schema.graphql
 *.css
 *.scss
 *.md
+
+# temporarly ignored in order to migrate to prettier@2 more efficiently and iteratively:
+ee/spec/frontend/api_spec.js
+ee/spec/frontend/admin/dev_ops_report
+ee/spec/frontend/analytics/code_review_analytics/components
+ee/spec/frontend/analytics/contribution_analytics/components
+ee/spec/frontend/analytics/cycle_analytics
+ee/spec/frontend/analytics/merge_request_analytics
+ee/spec/frontend/analytics/productivity_analytics
+ee/spec/frontend/analytics/repository_analytics/components
+ee/spec/frontend/analytics/shared/components
+ee/spec/frontend/approvals/components
+ee/spec/frontend/audit_events/components
+ee/spec/frontend/billings/subscriptions/components
+ee/spec/frontend/boards/components
+ee/spec/frontend/boards/stores
+ee/spec/frontend/burndown_chart
+ee/spec/frontend/compliance_dashboard/components/merge_requests
+ee/spec/frontend/dependencies/components
+ee/spec/frontend/epic/store
+ee/spec/frontend/geo_nodes/components
+ee/spec/frontend/geo_replicable/components
+ee/spec/frontend/groups/components
+ee/spec/frontend/groups/settings/
+ee/spec/frontend/incidents/components
+ee/spec/frontend/insights
+ee/spec/frontend/issuable/related_issues/components
+ee/spec/frontend/issues_analytics/components
+ee/spec/frontend/iterations/components
+ee/spec/frontend/license_compliance/components
+ee/spec/frontend/members/components/ldap
+ee/spec/frontend/on_demand_scans/components/profile_selector
+ee/spec/frontend/oncall_schedule
+ee/spec/frontend/pages/admin/users
+ee/spec/frontend/related_items_tree/components
+ee/spec/frontend/related_items_tree/store
+ee/spec/frontend/roadmap/components
+ee/spec/frontend/security_configuration/components
+ee/spec/frontend/security_configuration/dast_scanner_profiles_form/components
+ee/spec/frontend/security_configuration/sast/components
+ee/spec/frontend/security_dashboard/components
+ee/spec/frontend/security_dashboard/store/modules/project_selector
+ee/spec/frontend/sidebar/components
+ee/spec/frontend/storage_counter/components
+ee/spec/frontend/subscriptions/new/components
+ee/spec/frontend/threat_monitoring
+ee/spec/frontend/vue_mr_widget
+ee/spec/frontend/vue_shared/components/sidebar/epics_select
+ee/spec/frontend/vue_shared/license_compliance/components
+ee/spec/frontend/vue_shared/license_compliance/store
+ee/spec/frontend/vue_shared/security_reports/components
+ee/spec/frontend/vulnerabilities
+spec/frontend/alert_management/components
+spec/frontend/alerts_settings
+spec/frontend/authentication/u2f
+spec/frontend/badges/components
+spec/frontend/badges/store
+spec/frontend/batch_comments/components
+spec/frontend/behaviors
+spec/frontend/blob/components
+spec/frontend/boards
+spec/frontend/ci_settings_pipeline_triggers/components
+spec/frontend/ci_variable_list/ci_variable_list
+spec/frontend/create_cluster/components
+spec/frontend/create_cluster/eks_cluster/services
+spec/frontend/deploy_freeze/components
+spec/frontend/deploy_keys/components
+spec/frontend/design_management/components/design_notes
+spec/frontend/design_management/pages
+spec/frontend/diffs/components
+spec/frontend/diffs/store
+spec/frontend/error_tracking/components
+spec/frontend/error_tracking/store/list
+spec/frontend/error_tracking_settings/components
+spec/frontend/feature_flags/components
+spec/frontend/filtered_search/components
+spec/frontend/groups/components
+spec/frontend/helpers
+spec/frontend/ide/components
+spec/frontend/ide/lib
+spec/frontend/ide/stores
+spec/frontend/incidents/components
+spec/frontend/incidents_settings/components
+spec/frontend/integrations/edit/components
+spec/frontend/issuable/related_issues/components
+spec/frontend/issuable_list/components
+spec/frontend/issuable_show/components
+spec/frontend/issuable_suggestions/components
+spec/frontend/issue_show/components
+spec/frontend/issues_list/components
+spec/frontend/jobs/components
+spec/frontend/lib/utils
+spec/frontend/logs/components
+spec/frontend/members/components/action_buttons
+spec/frontend/members/components/filter_sort
+spec/frontend/members/components/table
+spec/frontend/milestones
+spec/frontend/monitoring
+spec/frontend/notes
+spec/frontend/packages/details/components
+spec/frontend/packages/details/store
+spec/frontend/packages/list/stores
+spec/frontend/packages/shared/components
+spec/frontend/pages/projects/forks/new/components
+spec/frontend/pages/projects/pipeline_schedules/shared/components
+spec/frontend/pages/projects/shared/permissions/components
+spec/frontend/pages/search/show
+spec/frontend/pages/sessions/new
+spec/frontend/pipeline_editor
+spec/frontend/pipeline_editor/components/lint
+spec/frontend/pipeline_new/components
+spec/frontend/pipelines
+spec/frontend/profile/account/components
+spec/frontend/projects
+spec/frontend/prometheus_metrics
+spec/frontend/ref/components
+spec/frontend/registry/explorer/components
+spec/frontend/registry/settings
+spec/frontend/related_merge_requests/components
+spec/frontend/releases/components
+spec/frontend/reports/codequality_report
+spec/frontend/reports/components
+spec/frontend/repository/components
+spec/frontend/self_monitor/components
+spec/frontend/serverless
+spec/frontend/sidebar
+spec/frontend/snippets/components
+spec/frontend/vue_mr_widget
+spec/frontend/vue_shared/components
+spec/frontend/vue_shared/directives
+spec/frontend_integration/ide/helpers
+spec/frontend_integration/test_helpers/factories
+spec/frontend_integration/test_helpers/utils
+spec/javascripts

.prettierrc

 {
   "printWidth": 100,
   "singleQuote": true,
+  "arrowParens": "avoid",
   "trailingComma": "all"
 }

package.json

@@ -208,7 +208,7 @@
     "nodemon": "^2.0.4",
     "pixelmatch": "^4.0.2",
     "postcss": "^7.0.14",
-    "prettier": "1.18.2",
+    "prettier": "2.2.1",
     "readdir-enhanced": "^2.2.4",
     "stylelint": "^10.1.0",
     "stylelint-config-recommended": "^2.2.0",

yarn.lock

@@ -9555,16 +9555,21 @@ pretender@^3.4.3:
     fake-xml-http-request "^2.1.1"
     route-recognizer "^0.3.3"
-prettier@1.18.2, prettier@^1.18.2:
-  version "1.18.2"
-  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.18.2.tgz#6823e7c5900017b4bd3acf46fe9ac4b4d7bda9ea"
-  integrity sha512-OeHeMc0JhFE9idD4ZdtNibzY0+TPHSpSSb9h8FqtP+YnoZZ1sl8Vc9b1sasjfymH3SonAF4QcA2+mzHPhMvIiw==
-
 prettier@2.0.5:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.0.5.tgz#d6d56282455243f2f92cc1716692c08aa31522d4"
   integrity sha512-7PtVymN48hGcO4fGjybyBSIWDsLU4H4XlvOHfq91pz9kkGlonzwTfYkaIEwiRg/dAJF9YlbsduBAgtYLi+8cFg==
+prettier@2.2.1:
+  version "2.2.1"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-2.2.1.tgz#795a1a78dd52f073da0cd42b21f9c91381923ff5"
+  integrity sha512-PqyhM2yCjg/oKkFPtTGUojv7gnZAoG80ttl45O6x2Ug/rMJw4wcc9k6aaf2hibP7BGVCCM33gZoGjyvt9mm16Q==
+
+prettier@^1.18.2:
+  version "1.18.2"
+  resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.18.2.tgz#6823e7c5900017b4bd3acf46fe9ac4b4d7bda9ea"
+  integrity sha512-OeHeMc0JhFE9idD4ZdtNibzY0+TPHSpSSb9h8FqtP+YnoZZ1sl8Vc9b1sasjfymH3SonAF4QcA2+mzHPhMvIiw==
+
 pretty-format@^25.2.1, pretty-format@^25.5.0:
   version "25.5.0"
   resolved "https://registry.yarnpkg.com/pretty-format/-/pretty-format-25.5.0.tgz#7873c1d774f682c34b8d48b6743a2bf2ac55791a"