Explicitly set required key on props

We've been violating our styleguide a number of times.
Now we enforce this with eslint, so we catch the violoations.

app/assets/javascripts/boards/components/board.js

@@ -36,6 +36,7 @@ export default Vue.extend({
     list: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
     disabled: {
       type: Boolean,

app/assets/javascripts/boards/components/board_card.vue

@@ -13,29 +13,36 @@ export default {
     list: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
     issue: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
     issueLinkBase: {
       type: String,
       default: '',
+      required: false,
     },
     disabled: {
       type: Boolean,
       default: false,
+      required: false,
     },
     index: {
       type: Number,
       default: 0,
+      required: false,
     },
     rootPath: {
       type: String,
       default: '',
+      required: false,
     },
     groupId: {
       type: Number,
+      required: false,
     },
   },
   data() {

app/assets/javascripts/boards/components/board_delete.js

@@ -7,6 +7,7 @@ export default Vue.extend({
     list: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
   },
   methods: {

app/assets/javascripts/boards/components/board_sidebar.js

@@ -34,6 +34,7 @@ export default Vue.extend({
     currentUser: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
   },
   data() {

app/assets/javascripts/boards/components/boards_selector.vue

@@ -43,6 +43,7 @@ export default {
     throttleDuration: {
       type: Number,
       default: 200,
+      required: false,
     },
     boardBaseUrl: {
       type: String,

app/assets/javascripts/clusters/components/application_row.vue

@@ -95,6 +95,7 @@ export default {
     updateable: {
       type: Boolean,
       default: true,
+      required: false,
     },
     updateSuccessful: {
       type: Boolean,

app/assets/javascripts/clusters/components/knative_domain_editor.vue

@@ -22,6 +22,7 @@ export default {
     ingressDnsHelpPath: {
       type: String,
       default: '',
+      required: false,
     },
   },
   computed: {

app/assets/javascripts/cycle_analytics/components/stage_code_component.vue

@@ -13,10 +13,12 @@ export default {
     items: {
       type: Array,
       default: () => [],
+      required: false,
     },
     stage: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
   },
 };

app/assets/javascripts/cycle_analytics/components/stage_component.vue

@@ -13,10 +13,12 @@ export default {
     items: {
       type: Array,
       default: () => [],
+      required: false,
     },
     stage: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
   },
 };

app/assets/javascripts/cycle_analytics/components/stage_review_component.vue

@@ -15,10 +15,12 @@ export default {
     items: {
       type: Array,
       default: () => [],
+      required: false,
     },
     stage: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
   },
 };

app/assets/javascripts/cycle_analytics/components/stage_staging_component.vue

@@ -16,10 +16,12 @@ export default {
     items: {
       type: Array,
       default: () => [],
+      required: false,
     },
     stage: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
   },
   computed: {

app/assets/javascripts/cycle_analytics/components/stage_test_component.vue

@@ -15,10 +15,12 @@ export default {
     items: {
       type: Array,
       default: () => [],
+      required: false,
     },
     stage: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
   },
   computed: {

app/assets/javascripts/environments/components/environment_rollback.vue

@@ -24,6 +24,7 @@ export default {
     isLastDeployment: {
       type: Boolean,
       default: true,
+      required: false,
     },
 
     environment: {

app/assets/javascripts/notebook/cells/code/index.vue

@@ -29,6 +29,7 @@ export default {
     metadata: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
   },
   computed: {

app/assets/javascripts/notebook/cells/output/index.vue

@@ -22,6 +22,7 @@ export default {
     metadata: {
       type: Object,
       default: () => ({}),
+      required: false,
     },
   },
   methods: {

app/assets/javascripts/sidebar/components/time_tracking/time_tracker.vue

@@ -40,6 +40,7 @@ export default {
     limitToHours: {
       type: Boolean,
       default: false,
+      required: false,
     },
     rootPath: {
       type: String,

app/assets/javascripts/vue_shared/components/content_viewer/content_viewer.vue

@@ -8,6 +8,7 @@ export default {
     content: {
       type: String,
       default: '',
+      required: false,
     },
     path: {
       type: String,

app/assets/javascripts/vue_shared/components/content_viewer/viewers/image_viewer.vue

@@ -16,6 +16,7 @@ export default {
     renderInfo: {
       type: Boolean,
       default: true,
+      required: false,
     },
     innerCssClasses: {
       type: [Array, Object, String],

app/assets/javascripts/vue_shared/components/project_avatar/default.vue

@@ -15,6 +15,7 @@ export default {
     size: {
       type: Number,
       default: 40,
+      required: false,
     },
   },
   computed: {

app/assets/javascripts/vue_shared/components/sidebar/labels_select/base.vue

@@ -77,12 +77,12 @@ export default {
     },
     enableScopedLabels: {
       type: Boolean,
-      require: false,
+      required: false,
       default: false,
     },
     scopedLabelsDocumentationLink: {
       type: String,
-      require: false,
+      required: false,
       default: '#',
     },
   },

app/assets/javascripts/vue_shared/components/sidebar/labels_select/dropdown_button.vue

@@ -33,12 +33,12 @@ export default {
     },
     enableScopedLabels: {
       type: Boolean,
-      require: false,
+      required: false,
       default: false,
     },
     scopedLabelsDocumentationLink: {
       type: String,
-      require: false,
+      required: false,
       default: '#',
     },
   },

app/assets/javascripts/vue_shared/components/smart_virtual_list.vue

@@ -8,9 +8,9 @@ export default {
     size: { type: Number, required: true },
     length: { type: Number, required: true },
     remain: { type: Number, required: true },
-    rtag: { type: String, default: 'div' },
-    wtag: { type: String, default: 'div' },
-    wclass: { type: String, default: null },
+    rtag: { type: String, default: 'div', required: false },
+    wtag: { type: String, default: 'div', required: false },
+    wclass: { type: String, default: null, required: false },
   },
 };
 </script>

ee/app/assets/javascripts/analytics/productivity_analytics/components/filter_dropdowns.vue

@@ -24,6 +24,7 @@ export default {
     hideGroupDropDown: {
       type: Boolean,
       default: false,
+      required: false,
     },
   },
   data() {

ee/app/assets/javascripts/analytics/shared/components/daterange.vue

@@ -31,7 +31,7 @@ export default {
     },
     minDate: {
       type: Date,
-      rerquired: false,
+      required: false,
       default: null,
     },
     maxDate: {

ee/app/assets/javascripts/approvals/components/app.vue

@@ -15,6 +15,7 @@ export default {
     isMrEdit: {
       type: Boolean,
       default: true,
+      required: false,
     },
   },
   computed: {

ee/app/assets/javascripts/approvals/components/modal_rule_create.vue

@@ -17,6 +17,7 @@ export default {
     isMrEdit: {
       type: Boolean,
       default: true,
+      required: false,
     },
   },
   computed: {

ee/app/assets/javascripts/approvals/components/mr_edit/empty_rule.vue

@@ -31,6 +31,7 @@ export default {
     isMrEdit: {
       type: Boolean,
       default: true,
+      required: false,
     },
     canEdit: {
       type: Boolean,

ee/app/assets/javascripts/approvals/components/rule_form.vue

@@ -28,6 +28,7 @@ export default {
     isMrEdit: {
       type: Boolean,
       default: true,
+      required: false,
     },
   },
   data() {

ee/app/assets/javascripts/feature_flags/components/environments_dropdown.vue

@@ -56,6 +56,7 @@ export default {
     disabled: {
       type: Boolean,
       default: false,
+      required: false,
     },
   },
   data() {