v0.20.0

• Feature: Support file variables reference request variables
• Feature: Support resolve the full response body regardless of the response content type
• Bug Fix: Fix Https proxy issue
• Bug Fix: Reload configuration when switching active text editor
• Bug Fix: Fix incorrect http symbol range
• Bug Fix: Ensure response saving directory existence before saving
• Improvement: Add icon for response webview tab
• Improvement: Switch JSON formatting library from jsonc-parser to js-beautify (@ygraber)
• Improvement: Treat the mime type of response body is application/json if the body itself is a JSON string
• Improvement: Unset gzip setting to avoid adding Accept-Encoding header automatically
• Improvement: [Upgrade applicationinsights to latest version to avoid monkey patching](#2