Updated compatibility table in README.md (#108)

diff --git a/README.md b/README.md
index 353d9f6..c9bf278 100644
--- a/README.md
+++ b/README.md
@@ -44,6 +44,7 @@
 |----------------|----------------|
 | 1.0.0          | 2.3.0 or later |
 | 1.1.0          | 2.4.0 or later |
+| 1.2.0          | 2.5.0 or later |
 
 If an incompatible version of the C++ client is installed, you may fail to build or run this library.