Bump absl-py to version 0.7.1

Added:

*   (flags) `flags.mark_bool_flags_as_mutual_exclusive`: convenience function to
    check that only one, or at most one, flag among a set of boolean flags are
    True.

Changed:

*   (bazel) Bazel 0.23+ or 0.22+ is now required for building/testing.
    Specifically, a Bazel version that supports
    `@bazel_tools//tools/python:python_version` for selecting the Python
    version.

Fixed:

*   abseil#94: LICENSE files are now included in sdist.
*   abseil#93: Change log added.

PiperOrigin-RevId: 238053201

absl/CHANGELOG.md

@@ -6,6 +6,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com).
 
 ## Unreleased
 
+Nothing notable unreleased.
+
+## 0.7.1 (2019-03-12)
+
 ### Added
 
 *   (flags) `flags.mark_bool_flags_as_mutual_exclusive`: convenience function to

setup.py

@@ -64,7 +64,7 @@
 
 setuptools.setup(
     name='absl-py',
-    version='0.7.0',
+    version='0.7.1',
     description=(
         'Abseil Python Common Libraries, '
         'see https://github.com/abseil/abseil-py.'),