travis-ci: bumped the NGINX core to 1.17.8.

Author: thibaultcha

.travis.yml

@@ -41,9 +41,9 @@ env:
     - TEST_NGINX_RANDOMIZE=1
     - LUACHECK_VER=0.21.1
   matrix:
-    - NGINX_VERSION=1.17.4 OPENSSL_VER=1.0.2u OPENSSL_PATCH_VER=1.0.2h
-    - NGINX_VERSION=1.17.4 OPENSSL_VER=1.1.0l OPENSSL_PATCH_VER=1.1.0d
-    - NGINX_VERSION=1.17.4 OPENSSL_VER=1.1.1d OPENSSL_PATCH_VER=1.1.1c
+    - NGINX_VERSION=1.17.8 OPENSSL_VER=1.0.2u OPENSSL_PATCH_VER=1.0.2h
+    - NGINX_VERSION=1.17.8 OPENSSL_VER=1.1.0l OPENSSL_PATCH_VER=1.1.0d
+    - NGINX_VERSION=1.17.8 OPENSSL_VER=1.1.1d OPENSSL_PATCH_VER=1.1.1c
 
 services:
   - memcache