aspell: fix dependencies missing

As of ubuntu 20.04, the two deps for aspell are missing.

Author: 0xc0170

tools/test/travis-ci/functions.sh

@@ -170,7 +170,9 @@ source_pkg()
   local aspell_deps="aspell
     aspell-en
     dictionaries-common
-    libaspell15"
+    libaspell15
+    libncursesw5
+    libtinfo5"
 
   local libfuse_deps="libfuse-dev
     libpcre3-dev