Lectures: Add JavaScript programming language (#60)

* Add JavaScript

18:46:23.356 ❤️ ERROR APIClient.sendRequest():151 - dataCorrupted(Swift.DecodingError.Context(codingPath: [CodingKeys(stringValue: "courses", intValue: nil), _JSONKey(stringValue: "Index 33", intValue: 33), CodingKeys(stringValue: "course", intValue: nil), CodingKeys(stringValue: "exercises", intValue: nil), _JSONKey(stringValue: "Index 1", intValue: 1), CodingKeys(stringValue: "programmingLanguage", intValue: nil)], debugDescription: "Cannot initialize ProgrammingLanguage from invalid String value JAVASCRIPT", underlyingError: nil))

* Update version

README.md

@@ -36,7 +36,7 @@ In Project Settings, on the tab "Package Dependencies", click "+" and add <https
 1. Add a dependency in Package.swift:
 ```swift
 dependencies: [
-    .package(url: "https://github.com/ls1intum/artemis-ios-core-modules", .upToNextMajor(from: "10.0.0")),
+    .package(url: "https://github.com/ls1intum/artemis-ios-core-modules", .upToNextMajor(from: "13.0.0")),
 ]
 ```
 

Sources/SharedModels/Exercise/ProgrammingExercise.swift

@@ -94,6 +94,7 @@ public extension ProgrammingExercise {
 
 public enum ProgrammingLanguage: String, RawRepresentable, Codable {
     case java = "JAVA"
+    case javascript = "JAVASCRIPT"
     case python = "PYTHON"
     case c = "C"
     case haskell = "HASKELL"