Merge pull request kubernetes-client#400 from kubernetes-incubator/yliaog-patch-2

Update README.md

Author: yliaog

README.md

@@ -88,6 +88,7 @@ supported versions of Kubernetes clusters.
 | client-python 1.0  | +              | ✓              | -              | -              |-               |
 | client-python 2.0  | +              | +              | ✓              | -              |-               |
 | client-python 3.0  | +              | +              | +              | ✓              |✓               |
+| client-python 4.0  | +              | +              | +              | +              |✓               |
 | client-python HEAD | +              | +              | +              | +              |✓               |
 
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@@ -111,6 +112,7 @@ between client-python versions.
 | 3.0 Alpha/Beta | Kubernetes main repo, 1.7 branch     | ✗                             |
 | 3.0            | Kubernetes main repo, 1.7 branch     | ✓                             |
 | 4.0 Alpha/Beta | Kubernetes main repo, 1.8 branch     | ✗                             |
+| 4.0            | Kubernetes main repo, 1.8 branch     | ✓                             |
 
 
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