Fixed some dumb things for compatability with .NET 3

IPA.Loader/Config/Data/List.cs

@@ -1,4 +1,5 @@
-using System;
+using IPA.Utilities;
+using System;
 using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
@@ -112,7 +113,7 @@ namespace IPA.Config.Data
         /// </summary>
         /// <returns>a comma-seperated list of the result of <see cref="Value.ToString"/> wrapped in square brackets</returns>
         public override string ToString()
-            => $"[{string.Join(",",this.Select(v => v.ToString()))}]";
+            => $"[{string.Join(",",this.Select(v => v.ToString()).StrJP())}]";
 
         IEnumerator IEnumerable.GetEnumerator() => ((IList<Value>)values).GetEnumerator();
     }

IPA.Loader/Config/Data/Map.cs

@@ -1,4 +1,5 @@
-using System.Collections;
+using IPA.Utilities;
+using System.Collections;
 using System.Collections.Generic;
 using System.Linq;
 
@@ -108,7 +109,7 @@ namespace IPA.Config.Data
         /// </summary>
         /// <returns>a JSON-like set of key-value pairs</returns>
         public override string ToString()
-            => $"{{{string.Join(",", this.Select(p => $"\"{p.Key}\":{p.Value.ToString()}"))}}}";
+            => $"{{{string.Join(",", this.Select(p => $"\"{p.Key}\":{p.Value.ToString()}").StrJP())}}}";
     }