Updated versioning syntax and README

Author: gjanders

README.md

@@ -359,11 +359,15 @@ These are appear to be from premium apps but it does imply that there is a mecha
 Feel free to open an issue on github or use the contact author on the SplunkBase link and I will try to get back to you when possible, thanks!
 
 ## Release Notes
-### 3.0.15
+### 4.0.0
 - Merged pull request from sifters relating to replacing comment macro with the triple backtick option introduced in Splunk 8.1. This involved editing many searches to change the format of the comments.
 
 New reports:
-- SearchHeadLevel - configtracker index example2
+- `SearchHeadLevel - configtracker index example2`
+
+The version number has moved to 4.0.0 as this change has the potential to introduce issues with the change of comment syntax. I've completed multiple reviews and I beleive there should be no broken alerts but please report them via the contact the author if you find any
+
+This version removes compatibility with Splunk versions below 8.1 due to the use of the newer comment syntax
 
 ### 3.0.14
 New reports:

default/app.conf

@@ -14,7 +14,7 @@ supported_themes = light,dark
 [launcher]
 author = Gareth Anderson
 description = Alerts and dashboards as described in the Splunk 2017 conf presentation How did you get so big?
-version = 3.0.15
+version = 4.0.0
 
 [package]
 id = SplunkAdmins