travis-ci: bumped the NGINX core to 1.19.9. (openresty#342)

Author: xiaocang

.travis.yml

@@ -41,9 +41,9 @@ env:
  - TEST_NGINX_RANDOMIZE=1
  - LUACHECK_VER=0.21.1
  matrix:
- - NGINX_VERSION=1.19.3 OPENSSL_VER=1.0.2u OPENSSL_PATCH_VER=1.0.2h
- - NGINX_VERSION=1.19.3 OPENSSL_VER=1.1.0l OPENSSL_PATCH_VER=1.1.0d
- - NGINX_VERSION=1.19.3 OPENSSL_VER=1.1.1g OPENSSL_PATCH_VER=1.1.1f
+ - NGINX_VERSION=1.19.9 OPENSSL_VER=1.0.2u OPENSSL_PATCH_VER=1.0.2h
+ - NGINX_VERSION=1.19.9 OPENSSL_VER=1.1.0l OPENSSL_PATCH_VER=1.1.0d
+ - NGINX_VERSION=1.19.9 OPENSSL_VER=1.1.1g OPENSSL_PATCH_VER=1.1.1f
 
 services:
  - memcache