Add openjdk8 and openjdk-ea to build matrix

Author: cichli

.travis.yml

@@ -19,7 +19,9 @@ env:
     - secure: "D2Ie7dUZ9nQOIWtkRl2XWZeijSL8expUXP3GziSqQV1scJzwexxnUsRvWOkc2YU8+6IIGz9tcyt9RrEFUVF31VZgRSHh8P5rGGCzI2l99djKhYFfSErElwgoAJZFtOzougZK66/Gtb5uDo5L/wlKHkl4st3miqm+mEvfJITDjRQ="
 jdk:
   - oraclejdk8
+  - openjdk8
   - openjdk11
+  - openjdk-ea
 stages:
   - name: check
   - name: test
@@ -70,3 +72,4 @@ jobs:
     - env: CLOJURE_VERSION=master TARGET=test-clj
     - env: CLOJURE_VERSION=master TARGET=test-cljs
     - env: CLOJURE_VERSION=1.10 TARGET=cloverage
+    - jdk: openjdk-ea