Attempt to build libsass manually for travis.

.travis.yml

@@ -1,5 +1,3 @@
-dist: xenial # Needed for libsass-dev :/
-
 os:
   - linux
 
@@ -15,7 +13,19 @@ addons:
 
 before_install:
   - sudo apt-get -qq update
-  - sudo apt-get install -y libsass-dev
+  - sudo apt-get install autoconf libtool
+  - git clone -b 3.5.4 https://github.com/sass/libsass.git
+  - cd libsass
+  - autoreconf --force --install
+  - |
+      ./configure \
+        --disable-tests \
+        --disable-static \
+        --enable-shared \
+        --prefix=/usr
+  - sudo make -j5 install
+  - cd ..
+
   - wget https://github.com/mozilla/geckodriver/releases/download/v0.20.1/geckodriver-v0.20.1-linux64.tar.gz
   - mkdir geckodriver
   - tar -xzf geckodriver-v0.20.1-linux64.tar.gz -C geckodriver