Update charted to 0.4.8 and roll

packages/quiver/lib/src/iterables/cycle.dart

Index: packages/quiver/lib/src/iterables/cycle.dart
diff --git a/packages/quiver/lib/src/iterables/cycle.dart b/packages/quiver/lib/src/iterables/cycle.dart
index 5cf3b12918c8e6916f20f538069c65245f316a96..9b6fe0ebb89334d5fc927af51449e694f3b2ea88 100644
--- a/packages/quiver/lib/src/iterables/cycle.dart
+++ b/packages/quiver/lib/src/iterables/cycle.dart
@@ -14,11 +14,9 @@
 
 part of quiver.iterables;
 
-/**
- * Returns an [Iterable] that infinitely cycles through the elements of
- * [iterable]. If [iterable] is empty, the returned Iterable will also be empty.
- */
-Iterable cycle(Iterable iterable) => new _Cycle(iterable);
+/// Returns an [Iterable] that infinitely cycles through the elements of
+/// [iterable]. If [iterable] is empty, the returned Iterable will also be empty.
+Iterable<T> cycle<T>(Iterable<T> iterable) => new _Cycle<T>(iterable);
 
 class _Cycle<T> extends InfiniteIterable<T> {
   final Iterable<T> _iterable;
@@ -38,7 +36,7 @@ class _CycleIterator<T> implements Iterator<T> {
   final Iterable<T> _iterable;
   Iterator<T> _iterator;
 
-  _CycleIterator(_iterable)
+  _CycleIterator(Iterable<T> _iterable)
       : _iterable = _iterable,
         _iterator = _iterable.iterator;