pin the openjdk image version

Signed-off-by: Denys Smirnov <denys@sourced.tech>

Dockerfile

@@ -12,7 +12,7 @@
 #==============================
 # Stage 1: Native Driver Build
 #==============================
-FROM openjdk:8-slim as native
+FROM openjdk:8u181-slim as native
 
 # install build dependencies
 RUN apt update && apt install -y maven
@@ -62,7 +62,7 @@ RUN go test -c -o /tmp/fixtures.test ./driver/fixtures/
 #=======================
 # Stage 3: Driver Build
 #=======================
-FROM openjdk:8-jre-alpine
+FROM openjdk:8u181-jre-alpine
 
 
 

README.md

@@ -1,4 +1,4 @@
-# C++ driver for [Babelfish](https://github.com/bblfsh/bblfshd) ![Driver Status](https://img.shields.io/badge/status-beta-dbd25c.svg) [![Build Status](https://travis-ci.org/bblfsh/cpp-driver.svg?branch=master)](https://travis-ci.org/bblfsh/cpp-driver) ![Native Version](https://img.shields.io/badge/cpp%20version-8-aa93ea.svg) ![Go Version](https://img.shields.io/badge/go%20version-1.12-63afbf.svg)
+# C++ driver for [Babelfish](https://github.com/bblfsh/bblfshd) ![Driver Status](https://img.shields.io/badge/status-beta-dbd25c.svg) [![Build Status](https://travis-ci.org/bblfsh/cpp-driver.svg?branch=master)](https://travis-ci.org/bblfsh/cpp-driver) ![Native Version](https://img.shields.io/badge/cpp%20version-8u181-aa93ea.svg) ![Go Version](https://img.shields.io/badge/go%20version-1.12-63afbf.svg)
 
 Development Environment
 -----------------------

build.yml

@@ -3,12 +3,12 @@ language: cpp
 go-runtime:
   version: '1.12-alpine'
 native:
-  image: 'openjdk:8-jre-alpine'
+  image: 'openjdk:8u181-jre-alpine'
   static:
     - path: 'native.sh'
       dest: 'native'
   build:
-    image: 'openjdk:8-slim'
+    image: 'openjdk:8u181-slim'
     deps:
       - 'apt update && apt install -y maven'
     run: