Update issue templates

Author: ledsun

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,32 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: ''
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+1. Go to '...'
+2. Click on '....'
+3. Scroll down to '....'
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**Execution environment (please complete the following information):**
+ - OS: [e.g. iOS]
+ - Version [e.g. 2.7.2]
+ - Node Version [e.g. v12.10.0]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/new-challenge-proposal.md

@@ -1,6 +1,9 @@
 ---
 name: New Challenge Proposal
 about: Propose a new challenge for learning JavaScript
+title: ''
+labels: ''
+assignees: ''
 
 ---