Update charted to 0.4.8 and roll

packages/quiver/tool/travis.sh

 #!/bin/bash
 
 # Copyright (c) 2015, Google Inc. Please see the AUTHORS file for details.
 # All rights reserved. Use of this source code is governed by a BSD-style
 # license that can be found in the LICENSE file.
 
 # Fast fail the script on failures.
 set -e
 
 # Verify that the libraries are error and warning-free.
 echo "Running dartanalyzer..."
 libs=$(find lib -maxdepth 1 -type f -name '*.dart')
 testing_libs=$(find lib/testing -maxdepth 1 -type f -name '*.dart')
 dartanalyzer $DARTANALYZER_FLAGS $libs $testing_libs test/all_tests.dart
 
+# Verify that dartfmt has been run
+if [[ "$TRAVIS_DART_VERSION" == "stable" ]]; then
+  # Only test on stable to avoid CI failure due to diffs between stable and dev.
+  echo "Checking dartfmt..."
+  if [[ $(dartfmt -n --set-exit-if-changed lib/ test/) ]]; then
+    echo "Failed dartfmt check: run dartfmt -w lib/ test/"
+    exit 1
+  fi
+fi
+
 # Run the tests.
 echo "Running tests..."
 pub run test:test
 
 # Gather and send coverage data.
 if [ "$REPO_TOKEN" ] && [ "$TRAVIS_DART_VERSION" = "stable" ]; then
   echo "Collecting coverage..."
   pub global activate dart_coveralls
   pub global run dart_coveralls report \
     --token $REPO_TOKEN \
     --retry 2 \
     --exclude-test-files \
     test/all_tests.dart
 fi