Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+I'm trying to...
+
+## What's happening
+
+When I do ... then this happens: ...
+
+## What should be happening
+
+I expect this would happen instead: ...
+
+## My setup
+
+StatiCrypt version:
+Node version:
+Any other relevant context: