feat: Moved cli client tests to XCTest to work in docker

Sources/CliClient/CliClient.swift

@@ -67,6 +67,7 @@ public struct CliClient {
       self.logger = logger
       self.mqttClientVersion = mqttClientVersion
     }
+
   }
 }
 
@@ -121,8 +122,8 @@ extension EnvVars {
     @Dependency(\.environment) var environment
 
     let defaultEnvVars = EnvVars()
-    let encoder = JSONEncoder()
-    let decoder = JSONDecoder()
+    let encoder = environment.jsonEncoder()
+    let decoder = environment.jsonDecoder()
 
     let defaultEnvDict = (try? encoder.encode(defaultEnvVars))
       .flatMap { try? decoder.decode([String: String].self, from: $0) }