Update issue templates (#227)

Sets up multiple issue templates for capturing future incoming issues so they can be labeled appropriately and queried for important information.

Author: leebyron

.github/ISSUE_TEMPLATE/bug-report.md

@@ -0,0 +1,24 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG]"
+labels: bug
+---
+
+<!-- Before filing a bug, please consider submitting a pull request with a failing test -->
+
+## Expected Behavior
+<!-- Describe what should happen -->
+
+## Current Behavior
+<!-- Describe what happens instead of the expected behavior -->
+
+## Possible Solution
+<!-- Not obligatory, but ideally suggest a fix or hypothesis for the bug -->
+
+## Steps to Reproduce
+<!-- Provide a link to a live example, or an unambiguous set of steps to reproduce this bug -->
+<!-- Please consider submitting this as a pull request which adds a failing test case -->
+
+## Context
+<!-- Any additional information about your environment or what are you trying to accomplish that might be relevant? -->

.github/ISSUE_TEMPLATE/feature-request.md

@@ -0,0 +1,18 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: "[REQUEST]"
+labels: enhancement
+---
+
+## What problem are you trying to solve?
+<!-- A concise description of what the problem is that this project should help solve -->
+
+## Describe the solution you'd like
+<!-- What should the API and behavior look like to address that problem? -->
+
+## Describe alternatives you've considered
+<!-- Are there any alternative solutions or features you've considered that are inadequate for solving this problem? -->
+
+## Additional context
+<!-- Any other context, examples, or adoptions paths to share? -->

.github/ISSUE_TEMPLATE/question.md

@@ -0,0 +1,17 @@
+---
+name: Question
+about: Not a bug or feature request?
+title: "[QUESTION]"
+labels: help wanted
+---
+
+<!-- 
+
+Please consider StackOverflow or other community discussion venues for general questions
+since this issue tracker is intended for bugs and feature requests to DataLoader. Questions 
+asked here are unlikely to get an answer in a timely fashion and might be closed without answer.
+
+https://graphql.org/community/
+https://stackoverflow.com/questions/tagged/graphql+dataloader
+
+-->