Update pip.js

use sha256 instead of md5

Author: sjoshi10

lib/pip.js

@@ -9,7 +9,7 @@ const { buildImage, getBindPath, getDockerUid } = require('./docker');
 const { getStripCommand, getStripMode, deleteFiles } = require('./slim');
 const {
   checkForAndDeleteMaxCacheVersions,
-  md5Path,
+  sha256Path,
   getRequirementsWorkingPath,
   getUserCachePath
 } = require('./shared');
@@ -474,7 +474,7 @@ function installRequirementsIfNeeded(
   }
 
   // Then generate our MD5 Sum of this requirements file to determine where it should "go" to and/or pull cache from
-  const reqChecksum = md5Path(slsReqsTxt);
+  const reqChecksum = sha256Path(slsReqsTxt);
 
   // Then figure out where this cache should be, if we're caching, if we're in a module, etc
   const workingReqsFolder = getRequirementsWorkingPath(