Your requirements could not be resolved to an installable set of packages.
Problem 1
- tastyigniter/ti-theme-orange v4.0.0-beta.1 requires tastyigniter/ti-ext-pages ^v4.0@beta -> found tastyigniter/ti-ext-pages[v4.x-dev] but it does not match your minimum-stability.
- tastyigniter/core v4.0.0-beta.1 requires tastyigniter/ti-theme-orange ^4.0@beta -> satisfiable by tastyigniter/ti-theme-orange[v4.0.0-beta.1].
- Root composer.json requires tastyigniter/core ^v4.0@beta -> satisfiable by tastyigniter/core[v4.0.0-beta.1].