circleCI - use cache version from circle environment var

Author: kumavis

.circleci/config.yml

@@ -87,7 +87,7 @@ jobs:
       - checkout
       - restore_cache:
           keys:
-            - v1.0-dependency-cache-{{ checksum "package-lock.json" }}
+            - v{{ .Environment.CACHE_VERSION }}-dependency-cache-{{ checksum "package-lock.json" }}
       - run:
           name: Install npm 6 + deps via npm
           command: |
@@ -97,7 +97,7 @@ jobs:
           paths:
           - node_modules
       - save_cache:
-          key: v1.0-dependency-cache-{{ checksum "package-lock.json" }}
+          key: v{{ .Environment.CACHE_VERSION }}-dependency-cache-{{ checksum "package-lock.json" }}
           paths:
             - node_modules