config (@teller-network) add github issue templates

.github/ISSUE_TEMPLATE/Bug.md

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+---
+name: 🐞 Bug Report
+about: Something is broken? 🔨
+---
+
+### Bug Report
+
+#### Summary
+
+<!-- Provide a summary describing the problem you are experiencing. -->
+
+#### Current behavior
+
+<!--
+  What is the current (buggy) behavior? Feel free to add as much information as possible.
+  Also, a screenshot often says more than a thousand words. :)
+  -->
+
+#### How to reproduce
+
+<!--
+Provide steps to reproduce the bug.
+Adding a failing Unit or Functional Test would help us a lot - you can submit one in a Pull Request separately, referencing this bug report.
+-->
+
+#### Expected behavior
+
+<!-- What was the expected (correct) behavior? -->
+
+#### Please provide additional information about your system
+
+**OS**:
+*Software Version**:
+**Node Version**:
+**NPM Version**:
+

.github/ISSUE_TEMPLATE/Feature_Request.md

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+---
+name: 🎉 Feature Request
+about: You have a neat idea that should be implemented? 🎩
+---
+
+### Feature Request
+
+<!-- Fill in the relevant information below to help triage your issue. -->
+
+#### Summary
+
+<!-- Provide a summary of the feature you would like to see implemented. -->
+

.github/ISSUE_TEMPLATE/Proposal.md

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+---
+name: 🤔 Proposal
+about: Have a nice proposal?
+---
+
+### Proposal description
+
+<!-- Describe the proposal you want here. -->
+