Update issue templates

Author: arturcic

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+## Expected Behavior
+<!-- Tell us what you believe should happen -->
+
+## Actual Behavior
+<!-- Tell us what is happening -->
+
+## Possible Fix
+<!-- Not obligatory, but suggest a fix or reason for the bug -->
+
+## Steps to Reproduce
+<!-- Provide a link to a live example, or an unambiguous set of steps to -->
+<!-- reproduce this bug. Include code to reproduce, if relevant -->
+
+## Context
+<!-- How has this bug affected you? What were you trying to accomplish? -->
+
+## Your Environment
+<!-- Include as many relevant details about the environment -->
+<!-- you experienced the bug in -->
+
+- Version Used:
+- Operating System and version (Windows 10, Ubuntu 18.04):
+- Link to your project:
+- Link to your CI build (if appropriate):

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: false
+contact_links:
+    - name: Gitter Community Chat
+      url: https://gitter.im/GitTools/GitVersion
+      about: Please ask and answer questions here.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: feature
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+## Detailed Description
+<!--- Provide a detailed description of the change or addition you are proposing -->
+
+## Context
+<!--- Why is this change important to you? How would you use it? -->
+<!--- How can it benefit other users? -->
+
+## Possible Implementation
+<!--- Not obligatory, but suggest an idea for implementing addition or change -->

.github/PULL_REQUEST_TEMPLATE.md

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+<!--- Provide a general summary of your changes in the Title above -->
+
+## Description
+<!--- Describe your changes in detail -->
+
+## Related Issue
+<!--- This project only accepts pull requests related to open issues -->
+<!--- If suggesting a new feature or change, please discuss it in an issue first -->
+<!--- If fixing a bug, there should be an issue describing it with steps to reproduce -->
+<!--- Please link to the issue here: -->
+
+## Motivation and Context
+<!--- Why is this change required? What problem does it solve? -->
+
+## How Has This Been Tested?
+<!--- Please describe in detail how you tested your changes. -->
+<!--- Include details of your testing environment, and the tests you ran to -->
+<!--- see how your change affects other areas of the code, etc. -->
+
+## Screenshots (if appropriate):
+
+## Checklist:
+<!--- Go over all the following points, and put an `x` in all the boxes that apply. -->
+<!--- If you're unsure about any of these, don't hesitate to ask. We're here to help! -->
+
+- [ ] My code follows the code style of this project.
+- [ ] My change requires a change to the documentation.
+- [ ] I have updated the documentation accordingly.
+- [ ] I have added tests to cover my changes.
+- [ ] All new and existing tests passed.