chore: improve templates for bug-reports and feature-requests

[skip ci]

.github/ISSUE_TEMPLATE/01_bug_report.md

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+⚠⚠⚠ If your issue is focused more on 'how do I do this?' rather than 'this is a broken functionality', then submit it to StackOverflow https://stackoverflow.com/questions/ask instead of GitHub, and make sure you add the `sweetalert2` tag to the question.
+
+## Current behavior
+
+<!-- Describe how the issue manifests. -->
+
+## Expected behavior
+
+<!-- Describe what the desired behavior would be. -->
+
+## Live demo
+
+<!-- If possible, please provide a working example in order for us to be able to reproduce the issue -->
+
+The template: [https://fantasy-word.glitch.me/](https://fantasy-word.glitch.me/), click "Remix on Glitch" to edit it:
+
+<img src="https://user-images.githubusercontent.com/6059356/46581537-0036a180-ca43-11e8-8d00-9ed5c6feea56.png" width="200">
+
+---
+
+Has SweetAlert2 helped you create an amazing application? You can show your support by making a donation in one of several ways:
+- https://www.paypal.me/limonte
+- https://www.patreon.com/limonte

.github/ISSUE_TEMPLATE/02_feature_request.md

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+## New feature motivation
+
+<!-- Describe the context, the use-case and the advantages of the feature request. -->
+
+## New feature description
+
+<!-- Optionally describe the functional changes that would have to be made in SweetAlert2. -->
+
+## New feature implementation
+
+<!-- Optionally describe the technical changes to be made in SweetAlert2. -->