Create issue_template.md

Author: tclindner

.github/issue_template.md

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+:tada: Thank you for opening an issue!
+
+When reporting a bug, please include:
+
+  * A little info about your environment
+    * npm-package-json-lint version
+    * npm version
+    * node version
+  * The output from npm-package-json-lint
+  * What you expected to happen
+  * The steps to reproduce the problem
+
+Thanks again :thumbsup: