adds Harfbuzz dependency install (Harbuzz = ttfautohint dependency) to Travis testing setup

.travis.yml

@@ -11,6 +11,7 @@ before_script:
   - pip install ufolint
   - sudo apt-get -qq update
   - sudo apt-get install -y shellcheck
+  - sudo apt-get install -y gcc g++ libfreetype6-dev libglib2.0-dev libcairo2-dev
 
 script: 
   - "ufolint $VARIANT"

build.sh

@@ -47,7 +47,7 @@ if [ "$1" = "--install-dependencies" ]
                     exit 1
             fi
         else
-        	# install Harfbuzz ttfautohint dependency
+        	# install Harfbuzz ttfautohint dependency (>v0.9.19)
             curl -L https://www.freedesktop.org/software/harfbuzz/release/harfbuzz-1.4.8.tar.bz2
             tar -xvjf harfbuzz-1.4.8.tar.bz2
             harfbuzz-1.4.8/configure