Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**IMPORTANT: Check the wiki**
+Before submitting new issue, please check the [Wiki](https://github.com/jgromes/RadioLib/wiki) and the [API documentation](https://jgromes.github.io/RadioLib/). You might find a solution to your issue there. 
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Minimal Arduino sketch to reproduce the behavior. Please user Markdown to style the code to make it readable (see [Markdown Cheatsheet](https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet#code)).
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Additional info (please complete):**
+ - MCU: [e.g. Arduino Uno, ESP8266 etc.]
+ - Wireless module type [e.g. SX1276, ESP8266, etc.]
+ - Arduino IDE version  [e.g. 1.8.5]
+ - Library version [e.g. 1.0.1]

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**IMPORTANT: Check the wiki**
+Before submitting new issue, please check the [Wiki](https://github.com/jgromes/RadioLib/wiki) and the [API documentation](https://jgromes.github.io/RadioLib/). You might find a solution to your issue there. 
+
+**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 [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/ISSUE_TEMPLATE/regular-issue.md

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+---
+name: Regular issue
+about: Use this template for any other issue
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**IMPORTANT: Before submitting an issue, please check the following:**
+1. **Read [CONTRIBUTING.md](https://github.com/jgromes/RadioLib/blob/master/CONTRIBUTING.md)!** Issues that do not follow this document will be closed/locked/deleted/ignored.
+2. RadioLib has a [Wiki](https://github.com/jgromes/RadioLib/wiki) and an extensive [API documentation](https://jgromes.github.io/RadioLib/). You might find a solution to your issue there.
+3. Make sure you're using the latest release of the library! Releases can be found [here](https://github.com/jgromes/RadioLib/releases).
+4. Use [Arduino forums](https://forum.arduino.cc/) to ask generic questions about wireless modules, wiring, usage, etc. Only create issues for problems specific to RadioLib!
+5. Error codes, their meaning and how to fix them can be found on [this page](https://jgromes.github.io/RadioLib/group__status__codes.html).