Updated the plugin to work with Serverless > 1.25.0 (#15)

* Adjusted template modification/output for LogicalIdCasing, minimized lodash dependency

* Updated the properties added to the CF template, as well as Resource and LogicalId casing. Added some unit tests

* Updated test script for yarn

* Update README.md

* tabs -> spaces

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-- 4.3.2
+- 4
 deploy:
   provider: npm
   email: accounts@acloud.guru

README.md

@@ -9,6 +9,9 @@ Plugin which auto-subscribes a log delivery lambda function to lambda log groups
 2. Add the following custom variables to your `serverless.yml` file.
 
 ```yaml
+plugins:
+  - serverless-plugin-cloudwatch-sumologic
+
 custom:
     shipLogs:
         # Required
@@ -29,16 +32,22 @@ Upon running `sls deploy` it will...
 1. if no existing cloudwatch function is specified
     1. Create a temporary function in the root of your serverless project
     2. Add that function to the in-memory CloudFormation script created by the serverless framework
-3. Iterate through all the functions (except for the sumologic one) and generate:
-    1. CloudFormation Subscription Filter resources linking the log groups created by serverless framework to the sumologic lambda function.
-4. Wait for the stack creation/update to complete and then delete the temporarily created function source directory.
+2. Iterate through all the functions (except for the sumologic one) and generate:
+    1. CloudFormation Subscription Filter Resource linking the log groups created by serverless framework to the sumologic lambda function.
+    2. Permissions to Invoke the logging function, as a Resource.
+3. Wait for the stack creation/update to complete and then delete the temporarily created function source directory.
 
 # Caveats
-You must be running serverless 1.6.0 or higher.
+You must be running serverless 1.25.0 or higher.
 
 # Contribute
 Please fork this repo to make changes and then issue a pull request back to this repo.
 No unit tests are included at this time. Unit tests will be added before this goes into version 1.0.0
 
+# Testing
+Tests are written using Mocha, Sinon, Chai, using Rewire
+
+Run with `npm test`
+
 # Contributors
 [Daniel Parker (@rlgod)](https://github.com/rlgod)