Added Mines3D version 1.4.2 and updated developer's email

Required

• [*] The app complies with the inclusion criteria
• [*] All related fdroiddata and RFP issues have been referenced in this merge request
• [*] Builds with fdroid build

Strongly Recommended

• The upstream app source code repo contains the app metadata (summary/description/images/changelog/etc) in a Fastlane or Triple-T folder structure
• [*] Releases are tagged

---

Closes fdroiddata#