chore(circle): Fix cache

Author: DanSnow

circle.yml

@@ -5,7 +5,9 @@ machine:
     CRYSTAL_URL: "https://github.com/crystal-lang/crystal/releases/download/${CRYSTAL_VERSION}/crystal-${CRYSTAL_VERSION}-1-linux-x86_64.tar.gz"
 dependencies:
   cache_directories:
-    - ".crystal"
+    - ~/.crystal
+    - lib
+    - .shards
   pre:
     - |
       if [[ ! -e "${HOME}/.crystal/bin/crystal" || $(crystal --version | grep -P -o '\d+\.\d+\.\d+') != "${CRYSTAL_VERSION}" ]]; then