README: cut 0.5 release and update compatibility matrix

Signed-off-by: Sergiusz Urbaniak <[email protected]>

Author: s-urbaniak

README.md

@@ -13,7 +13,8 @@ A set of Grafana dashboards and Prometheus alerts for Kubernetes.
 | release-0.2  | v1.14.1 and before | v2.11.0+  |
 | release-0.3  | v1.17 and before   | v2.11.0+  |
 | release-0.4  | v1.18              | v2.11.0+  |
-| master       | v1.18+             | v2.11.0+  |
+| release-0.5  | v1.19              | v2.11.0+  |
+| master       | v1.19              | v2.11.0+  |
 
 In Kubernetes 1.14 there was a major [metrics overhaul](https://github.com/kubernetes/enhancements/issues/1206) implemented.
 Therefore v0.1.x of this repository is the last release to support Kubernetes 1.13 and previous version on a best effort basis.
@@ -254,4 +255,4 @@ While the community has not yet fully agreed on alert severities and their to be
 ## Note
 
 You can use the external tool call [prom-metrics-check](https://github.com/ContainerSolutions/prom-metrics-check) to validate the created dashboards. This tool allows you to check if the metrics installed and used in Grafana dashboards exist in the Prometheus instance. 
-Please have a look at https://github.com/ContainerSolutions/prom-metrics-check.
+Please have a look at https://github.com/ContainerSolutions/prom-metrics-check.