ci(circle): pre-install Lint.jl

This should automatically install for live environments, however it is 
too slow to re-initialize for each spec.

Author: Arcanemagus

.circleci/config.yml

@@ -16,6 +16,16 @@ defaults: &defaults
           mkdir julia && \
           tar --extract --gzip --strip 1 --directory=julia --file=julia.tar.gz && \
           echo 'export PATH="/home/atom/julia/bin:$PATH"' >> $BASH_ENV
+    - run:
+        name: Julia version
+        command: julia --version
+    - run:
+        name: Install Lint.jl
+        # Note the "using Lint" is to pre-compile the cache
+        command: julia -E 'Pkg.add("Lint"); using Lint;'
+    - run:
+        name: Lint.jl version
+        command: julia -E 'Pkg.installed("Lint")'
     - run:
         name: Create VFB for Atom to run in
         command: /usr/local/bin/xvfb_start