Update .travis.yml

.travis.yml

@@ -18,7 +18,24 @@ before_install:
   - sudo update-ca-certificates -f
   - sudo apt-get install -y bzip2 openssl
   - $SHELL --version 2> /dev/null || dpkg -s $SHELL 2> /dev/null || which $SHELL
-  - sudo apt-get install -y bzip2 libreadline6-dev openssl
+  - sudo apt install -y \
+    build-essential \
+    curl \
+    libbz2-dev \
+    libffi-dev \
+    liblzma-dev \
+    libncursesw5-dev \
+    libreadline-dev \
+    libsqlite3-dev \
+    libssl-dev \
+    libxml2-dev \
+    libxmlsec1-dev \
+    llvm \
+    make \
+    tk-dev \
+    wget \
+    xz-utils \
+    zlib1g-dev
   - pyenv install "2.7.12" && pyenv global "2.7.12"
   - curl --version
   - wget --version