Make isWideString compatible with Phobos isNarrowString

source/tanya/range/adapter.d

@@ -14,6 +14,7 @@
  */
 module tanya.range.adapter;
 
+import std.traits : hasMember, isArray;
 import tanya.algorithm.mutation;
 import tanya.memory.lifetime;
 import tanya.meta.trait;

source/tanya/range/primitive.d

@@ -15,7 +15,7 @@
 module tanya.range.primitive;
 
 import std.algorithm.comparison;
-import std.traits : FunctionAttribute, hasElaborateCopyConstructor, functionAttributes;
+import std.traits : FunctionAttribute, ReturnType, hasElaborateCopyConstructor, functionAttributes;
 import tanya.memory.lifetime;
 import tanya.meta.trait;
 import tanya.range.array;