Use locale string for relative date tooltip (#364)

Signed-off-by: James Phillips <[email protected]>

package.json

@@ -60,16 +60,16 @@
     "@octokit/plugin-throttling": "^2.4.0",
     "@octokit/rest": "^16.23.2",
     "@sensuapp/eslint-plugin": "^1.0.0",
-    "@storybook/addon-a11y": "^5.3.13",
-    "@storybook/addon-actions": "^5.3.13",
-    "@storybook/addon-knobs": "^5.3.13",
-    "@storybook/addon-notes": "^5.3.13",
-    "@storybook/addon-viewport": "^5.3.13",
-    "@storybook/addons": "^5.3.13",
-    "@storybook/client-api": "^5.3.13",
-    "@storybook/core-events": "^5.3.13",
-    "@storybook/react": "^5.3.13",
-    "@storybook/theming": "^5.3.13",
+    "@storybook/addon-a11y": "^5.3.21",
+    "@storybook/addon-actions": "^5.3.21",
+    "@storybook/addon-knobs": "^5.3.21",
+    "@storybook/addon-notes": "^5.3.21",
+    "@storybook/addon-viewport": "^5.3.21",
+    "@storybook/addons": "^5.3.21",
+    "@storybook/client-api": "^5.3.21",
+    "@storybook/core-events": "^5.3.21",
+    "@storybook/react": "^5.3.21",
+    "@storybook/theming": "^5.3.21",
     "@testing-library/react": "^8.0.1",
     "@types/autosuggest-highlight": "^3.1.1",
     "@types/classnames": "^2.2.7",
@@ -220,7 +220,8 @@
     "graphql": "14.4.2",
     "graphql-config/**/graphql": "14.4.2",
     "graphql-import/**/graphql": "14.4.2",
-    "serialize-javascript": "3.1.0"
+    "serialize-javascript": "3.1.0",
+    "prismjs": "1.23.0"
   },
   "graphQLSchemaRef": "4fbba86"
 }

src/lib/component/base/RelativeDate/RelativeDate.js

@@ -85,7 +85,7 @@ class RelativeDate extends React.Component {
       relativeDate = capitalizeStr(relativeDate);
     }
     return (
-      <Tooltip title={dateValue.toString()}>
+      <Tooltip title={dateValue.toLocaleString()}>
         <time dateTime={dateTime} {...props}>
           {relativeDate}
         </time>