📦 Dependency updates. Removed unmaintained keytar

• Hiding another "Upgrade" button
• Removed unmaintained keytar dependency. Closed #142
• Update dependency electron from v26.2.4 to v35.0.2
• Update dependency electron-builder from v24.6.4 to v26.0.11
• Update dependency electron-context-menu from v3.6.1 to v4.0.5
• Update dependency electron-store from v3.6.1 to v10.0.1
• Update dependency electron-updater from v6.1.4 to v6.6.2