fix: upgrade multiple dependencies with Snyk

Snyk has created this PR to upgrade:
  - @storybook/addon-knobs from 5.0.10 to 5.3.19.
    See this package in npm: 
  - @storybook/addon-notes from 5.0.10 to 5.3.19.
    See this package in npm: 
  - @storybook/addon-viewport from 5.0.10 to 5.3.19.
    See this package in npm: 
  - @storybook/addons from 5.0.10 to 5.3.19.
    See this package in npm: 
  - @storybook/react from 5.0.10 to 5.3.19.
    See this package in npm: 

See this project in Snyk:
https://app.snyk.io/org/tidepool/project/20c00306-8e92-463c-855a-94190c33943d?utm_source=github&utm_medium=upgrade-pr

package.json

@@ -87,11 +87,11 @@
     "@babel/preset-env": "7.1.0",
     "@babel/preset-react": "7.0.0",
     "@babel/runtime": "7.0.0",
-    "@storybook/addon-knobs": "5.0.10",
-    "@storybook/addon-notes": "5.0.10",
-    "@storybook/addon-viewport": "5.0.10",
-    "@storybook/addons": "5.0.10",
-    "@storybook/react": "5.0.10",
+    "@storybook/addon-knobs": "5.3.19",
+    "@storybook/addon-notes": "5.3.19",
+    "@storybook/addon-viewport": "5.3.19",
+    "@storybook/addons": "5.3.19",
+    "@storybook/react": "5.3.19",
     "babel-core": "7.0.0-bridge.0",
     "babel-eslint": "9.0.0",
     "babel-loader": "8.0.2",