Update for the latest version postgresql

Author: zeroc0d3

.travis.yml

@@ -10,7 +10,7 @@ services:
 env:
   global:
     - COMMIT=${TRAVIS_COMMIT::8}
-    - REPO=dockerframework/postgresql:10.2
+    - REPO=dockerframework/postgresql
     - CGO_ENABLED=0
     - GOOS=linux
     - GOARCH=amd64

README.md

@@ -1,4 +1,4 @@
 # PostgreSQL Container
 PostgreSQL Container of Docker Framework
 
-[![Build Status](https://travis-ci.org/dockerframework/postgresql.svg?branch=master)](https://travis-ci.org/dockerframework/postgresql) [![](https://images.microbadger.com/badges/image/dockerframework/postgresql:10.2.svg)](https://microbadger.com/images/dockerframework/postgresql:10.2 "Layers") [![](https://images.microbadger.com/badges/version/dockerframework/postgresql:10.2.svg)](https://microbadger.com/images/dockerframework/postgresql:10.2 "Version") [![GitHub issues](https://img.shields.io/github/issues/dockerframework/postgresql.svg)](https://github.com/dockerframework/postgresql/issues) [![GitHub forks](https://img.shields.io/github/forks/dockerframework/postgresql.svg)](https://github.com/dockerframework/postgresql/network) [![GitHub stars](https://img.shields.io/github/stars/dockerframework/postgresql.svg)](https://github.com/dockerframework/postgresql/stargazers) [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/dockerframework/postgresql/master/LICENSE)
+[![Build Status](https://travis-ci.org/dockerframework/postgresql.svg?branch=master)](https://travis-ci.org/dockerframework/postgresql) [![](https://images.microbadger.com/badges/image/dockerframework/postgresql:latest.svg)](https://microbadger.com/images/dockerframework/postgresql:latest "Layers") [![](https://images.microbadger.com/badges/version/dockerframework/postgresql:latest.svg)](https://microbadger.com/images/dockerframework/postgresql:latest "Version") [![GitHub issues](https://img.shields.io/github/issues/dockerframework/postgresql.svg)](https://github.com/dockerframework/postgresql/issues) [![GitHub forks](https://img.shields.io/github/forks/dockerframework/postgresql.svg)](https://github.com/dockerframework/postgresql/network) [![GitHub stars](https://img.shields.io/github/stars/dockerframework/postgresql.svg)](https://github.com/dockerframework/postgresql/stargazers) [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/dockerframework/postgresql/master/LICENSE)

tests/docker_tests.sh

@@ -1,7 +1,7 @@
 #!/usr/bin/env bash
 
 DOCKER_IMAGE="dockerframework/postgresql"
-DOCKER_TAG="10.2"
+DOCKER_TAG="latest"
 
 #### Halt script on error
 set -e