Upgrade to Elasticsearch 6.8.6 and release version 6.8.6.0

Author: vvanholl

README.md

@@ -27,6 +27,7 @@ It collects all relevant metrics and makes them available to Prometheus via the
 
 | Elasticsearch  | Plugin         | Release date |
 | -------------- | -------------- | ------------ |
+| 6.8.6          | 6.8.6.0        | Jan  1, 2020 |
 | 6.8.5          | 6.8.5.0        | Nov 30, 2019 |
 | 6.8.4          | 6.8.4.0        | Nov 03, 2019 |
 | 6.8.3          | 6.8.3.0        | Sep 12, 2019 |
@@ -124,7 +125,7 @@ It collects all relevant metrics and makes them available to Prometheus via the
 ## Install
 
 - Since Elasticsearch 6.0.0 :
-    `./bin/elasticsearch-plugin install -b https://github.com/vvanholl/elasticsearch-prometheus-exporter/releases/download/6.8.5.0/prometheus-exporter-6.8.5.0.zip`
+    `./bin/elasticsearch-plugin install -b https://github.com/vvanholl/elasticsearch-prometheus-exporter/releases/download/6.8.6.0/prometheus-exporter-6.8.6.0.zip`
 
 - On Elasticsearch 5.x.x :
     `./bin/elasticsearch-plugin install -b https://github.com/vvanholl/elasticsearch-prometheus-exporter/releases/download/5.6.16.0/elasticsearch-prometheus-exporter-5.6.16.0.zip`

build.gradle

@@ -8,7 +8,7 @@ buildscript {
     }
 
     dependencies {
-        classpath "org.elasticsearch.gradle:build-tools:6.8.5" // How can we use ${versions.elasticsearch} here ???
+        classpath "org.elasticsearch.gradle:build-tools:6.8.6" // How can we use ${versions.elasticsearch} here ???
         classpath group: 'javax.xml.bind', name: 'jaxb-api', version: '2.3.0'
         classpath group: 'com.sun.xml.bind', name: 'jaxb-core', version: '2.3.0'
         classpath group: 'com.sun.xml.bind', name: 'jaxb-impl', version: '2.3.0'

gradle.properties

@@ -1,6 +1,6 @@
 group = org.elasticsearch.plugin.prometheus
 
-version = 6.8.5.1-SNAPSHOT
+version = 6.8.6.0
 
 pluginName = prometheus-exporter
 pluginClassname = org.elasticsearch.plugin.prometheus.PrometheusExporterPlugin