Bump Platformify to v0.2.5

Release notes

Include more recent supported service versions by @chadwcarlson in https://github.com/platformsh/platformify/pull/183
Replace local mount source by storage for Upsun by @lolautruche in https://github.com/platformsh/platformify/pull/177
Change service names to have dashes only by @akalipetis in https://github.com/platformsh/platformify/pull/185
Remove sharp as a Node.js dependency by @akalipetis in https://github.com/platformsh/platformify/pull/188
Next.js: Fallback to next build if no build script is found by @akalipetis in https://github.com/platformsh/platformify/pull/187
Add APP_KEYS environment variable to .environment by @akalipetis in https://github.com/platformsh/platformify/pull/189

Full Changelog: https://github.com/platformsh/platformify/compare/v0.2.4...v0.2.5