Update issue templates

Author: LandonTClipp

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,35 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+## Description
+
+A clear and concise description of what the bug is.
+
+## Reproducer
+
+Steps to reproduce the behavior.
+
+## Expected behavior
+
+A clear and concise description of what you expected to happen.
+
+## Mockery version
+
+`vX.Y.Z`
+
+## Installation Mechanism
+
+- [] `go get`
+- [] Pre-built release
+- [] homebrew
+- [] Other: [please describe]
+
+## Go version
+
+Version of Go used to build mockery from source (if applicable).