Fix colon character in cwd on Windows (#27)

Fix colon character in cwd on Windows

Author: Robert Jackson

lib/gather/cache.js

@@ -1,9 +1,16 @@
 const Cache = require('sync-disk-cache');
 const getRepoInfo = require('git-repo-info');
+const crypto = require('crypto');
 
 const gitInfo = getRepoInfo();
 
-const cachePath = `ember-codemods-telemetry-helpers-${gitInfo.sha}-${process.cwd()}`;
+const cwdHash = crypto
+  .createHash('sha256')
+  .update(process.cwd(), 'utf8')
+  .digest('hex');
+
+const cachePath = `ember-codemods-telemetry-helpers-${gitInfo.sha}-${cwdHash}`;
+
 const cache = new Cache(cachePath);
 
 module.exports = cache;