fix SpeziStudy dependency (#30)

# fix SpeziStudy dependency

## ♻️ Current situation & Problem
version requirement was too relaxed


## ⚙️ Release Notes
- fix SpeziStudy dependency


## 📚 Documentation
n/a


## ✅ Testing
n/a


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Author: lukaskollmer

Package.swift

@@ -27,9 +27,11 @@ let package = Package(
         .executable(name: "MHCStudyDefinitionExporterCLI", targets: ["MHCStudyDefinitionExporterCLI"])
     ],
     dependencies: [
-        .package(url: "https://github.com/StanfordSpezi/SpeziStudy.git", from: "0.1.19"),
+        .package(url: "https://github.com/StanfordSpezi/SpeziStudy.git", .upToNextMinor(from: "0.1.19")),
         .package(url: "https://github.com/StanfordSpezi/SpeziFoundation.git", from: "2.4.0"),
-        .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.6.2")
+        .package(url: "https://github.com/apple/swift-argument-parser.git", from: "1.6.2"),
+        // not used directly but we need to fix it below 0.9.0 for the time being
+        .package(url: "https://github.com/apple/FHIRModels.git", .upToNextMinor(from: "0.8.0"))
     ],
     targets: [
         .target(