Bump extend from 3.0.1 to 3.0.2 in /intro/server

Bumps [extend](https://github.com/justmoon/node-extend) from 3.0.1 to 3.0.2.
- [Release notes](https://github.com/justmoon/node-extend/releases)
- [Changelog](https://github.com/justmoon/node-extend/blob/master/CHANGELOG.md)
- [Commits](https://github.com/justmoon/node-extend/compare/v3.0.1...v3.0.2)

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

README.md

@@ -1,4 +1,4 @@
-<i>This workshop, as well as the slides that go with it (linked below), are all licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>. The `server/` directories use [`moleculer-node-realworld-example`](https://github.com/gothinkster/moleculer-node-realworld-example-app), which has its own license. The JavaScript interop example uses [`localForage`](https://github.com/localForage/localForage), which is (c) 2013-2017 Mozilla, under the Apache License 2.0. The rest of the code is a variation on [`elm-spa-example`](https://github.com/rtfeldman/elm-spa-example/), an [MIT-licensed](https://github.com/rtfeldman/elm-spa-example/blob/master/LICENSE) implementation of the [`realworld`](https://github.com/gothinkster/realworld) front-end. Many thanks to the authors of these projects!</i>
+<i>This workshop is licensed under a <a rel="license" href="http://creativecommons.org/licenses/by/4.0/">Creative Commons Attribution 4.0 International License</a>. The `server/` directories use [`moleculer-node-realworld-example`](https://github.com/gothinkster/moleculer-node-realworld-example-app), which has its own license. The JavaScript interop example uses [`localForage`](https://github.com/localForage/localForage), which is (c) 2013-2017 Mozilla, under the Apache License 2.0. The rest of the code is a variation on [`elm-spa-example`](https://github.com/rtfeldman/elm-spa-example/), an [MIT-licensed](https://github.com/rtfeldman/elm-spa-example/blob/master/LICENSE) implementation of the [`realworld`](https://github.com/gothinkster/realworld) front-end. Many thanks to the authors of these projects!</i>
 
 Getting Started
 ===============
@@ -29,9 +29,9 @@ cd elm-0.19-workshop
 6. Continue with either the [`intro`](https://github.com/rtfeldman/elm-0.19-workshop/blob/master/intro/README.md) or [`advanced`](https://github.com/rtfeldman/elm-0.19-workshop/blob/master/advanced/README.md) instructions, depending on which workshop you're doing!
 
 Video Course of this Workshop
-=============================
+=======================
 
 I recorded full-length videos for [Frontend Masters](https://frontendmasters.com/), in which I teach both of these workshops start to finish:
 
-* [Introduction to Elm](https://frontendmasters.com/courses/intro-elm/) video course ([slides](https://docs.google.com/presentation/d/1LM_W2BRs_ItT-SPDe70C10cbwhGNHGQlJ1fVnAdnRIY/edit?usp=sharing)
-* [Advanced Elm](https://frontendmasters.com/courses/advanced-elm/) video course ([slides](https://docs.google.com/presentation/d/1aFZBXs9kzlZww2JN6iDmrYiQaxKlCAz6a5zpt882GHk/edit?usp=sharing))
+* [Introduction to Elm](https://frontendmasters.com/courses/intro-elm/) video course
+* [Advanced Elm](https://frontendmasters.com/courses/advanced-elm/) video course

intro/part4/elm.json

@@ -3,7 +3,7 @@
     "source-directories": [
         "src"
     ],
-    "elm-version": "0.19.1",
+    "elm-version": "1.19.0",
     "dependencies": {
         "direct": {
             "elm/browser": "1.0.0",

intro/server/package-lock.json

@@ -2230,9 +2230,9 @@
       }
     },
     "extend": {
-      "version": "3.0.1",
-      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.1.tgz",
-      "integrity": "sha1-p1Xqe8Gt/MWjHOfnYtuq3F5jZEQ=",
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
+      "integrity": "sha512-fjquC59cD7CyW6urNXK0FBufkZcoiGG80wTuPujX590cB5Ttln20E2UB4S/WARVqhXffZl2LNgS+gQdPIIim/g==",
       "dev": true
     },
     "extend-shallow": {
@@ -4595,7 +4595,7 @@
         },
         "onetime": {
           "version": "1.1.0",
-          "resolved": "http://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
           "integrity": "sha1-ofeDj4MUxRbwXs78vEzP4EtO14k=",
           "dev": true
         },
@@ -5359,7 +5359,7 @@
         },
         "onetime": {
           "version": "1.1.0",
-          "resolved": "http://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
           "integrity": "sha1-ofeDj4MUxRbwXs78vEzP4EtO14k=",
           "dev": true
         },
@@ -5641,7 +5641,7 @@
         },
         "onetime": {
           "version": "1.1.0",
-          "resolved": "http://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
           "integrity": "sha1-ofeDj4MUxRbwXs78vEzP4EtO14k=",
           "dev": true
         },
@@ -8144,7 +8144,7 @@
         },
         "onetime": {
           "version": "1.1.0",
-          "resolved": "http://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
+          "resolved": "https://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz",
           "integrity": "sha1-ofeDj4MUxRbwXs78vEzP4EtO14k=",
           "dev": true
         },