Bump lodash from 4.17.5 to 4.17.20 in /tutorials/5-start

Bumps [lodash](https://github.com/lodash/lodash) from 4.17.5 to 4.17.20.
- [Release notes](https://github.com/lodash/lodash/releases)
- [Commits](lodash/lodash@4.17.5...4.17.20)

Signed-off-by: dependabot[bot] <support@github.com>

tutorials/5-start/yarn.lock

@@ -2025,7 +2025,7 @@ event-source-polyfill@0.0.12:
 
 event-stream@~3.3.0:
   version "3.3.4"
-  resolved "http://registry.npmjs.org/event-stream/-/event-stream-3.3.4.tgz#4ab4c9a0f5a54db9338b4c34d86bfce8f4b35571"
+  resolved "https://registry.npmjs.org/event-stream/-/event-stream-3.3.4.tgz#4ab4c9a0f5a54db9338b4c34d86bfce8f4b35571"
   dependencies:
     duplexer "~0.1.1"
     from "~0"
@@ -3202,8 +3202,8 @@ locate-path@^2.0.0:
     path-exists "^3.0.0"
 
 lodash@^4.14.0, lodash@^4.17.4, lodash@^4.3.0, lodash@^4.5.1:
-  version "4.17.5"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.5.tgz#99a92d65c0272debe8c96b6057bc8fbfa3bed511"
+  version "4.17.20"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.20.tgz#b44a9b6297bcb698f1c51a3545a2b3b368d59c52"
 
 longest@^1.0.1:
   version "1.0.1"