v2.1.0-beta.1

Changes

• UI elements follow macOS accent colour,
• macOS Big Sur compatibility updates,
• New app icon,
• Support Apple Silicon arm64 arch (disclaimer: I don't have access to a Mac with M1 processor, so this is not tested in any way),
• Better outgoing URLs handling,
• Updated dependencies to latest versions,
• Many development-related changes (ESLint, Webpack, Volta)