chore(deps): bump com.google.devtools.ksp from 1.9.25-1.0.20 to 2.1.21-2.0.1 (#412)

* chore(deps): bump com.google.devtools.ksp

Bumps [com.google.devtools.ksp](https://github.com/google/ksp) from 1.9.25-1.0.20 to 2.1.21-2.0.1.
- [Release notes](https://github.com/google/ksp/releases)
- [Commits](https://github.com/google/ksp/compare/1.9.25-1.0.20...2.1.21-2.0.1)

---
updated-dependencies:
- dependency-name: com.google.devtools.ksp
  dependency-version: 2.1.21-2.0.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

* fix: make value nullable

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Naveen Singh <36371707+naveensingh@users.noreply.github.com>

app/src/main/kotlin/org/fossify/messages/helpers/Converters.kt

@@ -14,20 +14,28 @@ class Converters {
     private val messageAttachmentType = object : TypeToken<MessageAttachment?>() {}.type
 
     @TypeConverter
-    fun jsonToAttachmentList(value: String) = gson.fromJson<ArrayList<Attachment>>(value, attachmentType)
+    fun jsonToAttachmentList(value: String?): ArrayList<Attachment>? {
+        return gson.fromJson<ArrayList<Attachment>>(value, attachmentType)
+    }
 
     @TypeConverter
     fun attachmentListToJson(list: ArrayList<Attachment>) = gson.toJson(list)
 
     @TypeConverter
-    fun jsonToSimpleContactList(value: String) = gson.fromJson<ArrayList<SimpleContact>>(value, simpleContactType)
+    fun jsonToSimpleContactList(value: String?): ArrayList<SimpleContact>? {
+        return gson.fromJson<ArrayList<SimpleContact>>(value, simpleContactType)
+    }
 
     @TypeConverter
     fun simpleContactListToJson(list: ArrayList<SimpleContact>) = gson.toJson(list)
 
     @TypeConverter
-    fun jsonToMessageAttachment(value: String) = gson.fromJson<MessageAttachment>(value, messageAttachmentType)
+    fun jsonToMessageAttachment(value: String): MessageAttachment? {
+        return gson.fromJson<MessageAttachment>(value, messageAttachmentType)
+    }
 
     @TypeConverter
-    fun messageAttachmentToJson(messageAttachment: MessageAttachment?) = gson.toJson(messageAttachment)
+    fun messageAttachmentToJson(messageAttachment: MessageAttachment?): String? {
+        return gson.toJson(messageAttachment)
+    }
 }

gradle/libs.versions.toml

@@ -3,7 +3,7 @@
 kotlin = "2.1.21"
 kotlinxSerializationJson = "1.8.1"
 #KSP
-ksp = "1.9.25-1.0.20"
+ksp = "2.1.21-2.0.1"
 #Detekt
 detekt = "1.23.8"
 #AndroidX