ci: try install openssl

.travis.yml

@@ -14,6 +14,15 @@ matrix:
   allow_failures:
     - rust: stable
 
+install:
+    - wget https://github.com/openssl/openssl/archive/OpenSSL_1_1_1d.tar.gz
+    - tar xvfz OpenSSL_1_1_1d.tar.gz && cd openssl-OpenSSL_1_1_1d
+    - if [ $TRAVIS_OS_NAME = "linux" ]; then ./Configure linux-x86_64 --prefix=$HOME/installed_openssl; fi
+    - if [ $TRAVIS_OS_NAME = "osx" ]; then ./Configure darwin64-x86_64-cc --prefix=$HOME/installed_openssl; fi
+    - make && make install_sw && cd ..
+    - export PATH=$HOME/installed_openssl/bin:$PATH
+    - export LD_LIBRARY_PATH=$HOME/installed_openssl/lib:$LD_LIBRARY_PATH
+
 script:
     - cargo test
     - cargo test --features early-data