Added more information to issue template. (#64)

Author: Kevin Hellemun

.github/ISSUE_TEMPLATE.md

@@ -1,15 +1,25 @@
-## Steps to reproduce:
-1.
 
-## What should happen:
-1.
+  ## Steps to reproduce:
+  1.
 
-## What happens:
-1.
+  ## What should happen:
+  1.
 
-## Logs
-- Logs
+  ## What happens:
+  1.
 
-## Extra info:
-- Tested on
+  ## Traceback
+  [//]: # (If there is a traceback please share it in a quote! You can do this by pasting the traceback text, then highlight it and press the quote button.)
+
+  ## SDK version and environment
+  - Tested on [0.12.4](https://github.com/bunq/sdk_csharp/releases/tag/0.12.4)
+  - [ ] Sandbox
+  - [ ] Production
+
+  ## Response id
+  [//]: # (If this error has something to do with a request that fails, please provide the response id of the request.)
+  - Response id:
+
+  ## Extra info:
+  [//]: # (Please provide any other relevant information here)