Update README.md

README.md

@@ -5,6 +5,9 @@
 [![Build Status](https://api.travis-ci.org/google/googletest.svg?branch=master)](https://travis-ci.org/google/googletest)
 [![Build status](https://ci.appveyor.com/api/projects/status/4o38plt0xbo1ubc8/branch/master?svg=true)](https://ci.appveyor.com/project/GoogleTestAppVeyor/googletest/branch/master)
 
+### Summer Vacation
+June 26, 2019 - July 20 2019 due to summer vacations there will be much reduced activity on Pull Requests and issues from the maintainers. 
+
 ### Future Plans
 
 #### 1.8.x Release: