First issue after run composer update :
Loading composer repositories with package information
Updating dependencies
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Root composer.json requires flarum/core ^2.0, found flarum/core[v2.0.0-beta.1, ..., 2.x-dev] but it does not match your minimum-stability.
Problem 2
- Root composer.json requires datlechin/flarum-copy-links * -> satisfiable by datlechin/flarum-copy-links[v0.1.0, v0.1.1, v1.0.0, v1.0.1].
- datlechin/flarum-copy-links[v0.1.0, ..., v0.1.1, v1.0.0, ..., v1.0.1] require flarum/core ^1.2 -> found flarum/core[v1.2.0, ..., v1.8.13]but it conflicts with your root composer.json require (^2.0).
Problem 3
- Root composer.json requires fof/discussion-templates * -> satisfiable by fof/discussion-templates[1.0.0].
- fof/discussion-templates 1.0.0 requires flarum/core ^1.8.0 -> found flarum/core[v1.8.0, ..., v1.8.13] but it conflicts with your root composer.json require (^2.0).
Problem 4
- Root composer.json requires fof/discussion-views * -> satisfiable by fof/discussion-views[1.0.0].
- fof/discussion-views 1.0.0 requires flarum/core ^1.8.0 -> found flarum/core[v1.8.0, ..., v1.8.13] but it conflicts with your root composer.json require (^2.0).
Problem 5
- datlechin/flarum-link-preview[v0.1.0, ..., v0.2.2, v1.0.0] require flarum/core ^1.2 -> found flarum/core[v1.2.0, ..., v1.8.13] but it conflicts with your root composer.json require (^2.0).
- datlechin/flarum-link-preview v1.0.1 requires flarum/core ^1.5 -> found flarum/core[v1.5.0, ..., v1.8.13] but it conflicts with your rootcomposer.json require (^2.0).
- datlechin/flarum-link-preview[v1.1.0, ..., v1.3.3] require flarum/core ^v1.6 -> found flarum/core[v1.6.0, ..., v1.8.13] but it conflicts with your root composer.json require (^2.0).
- datlechin/flarum-link-preview[v1.4.0, ..., v1.5.0] require flarum/core ^v1.8 -> found flarum/core[v1.8.0, ..., v1.8.13] but it conflicts with your root composer.json require (^2.0).
- datlechin/flarum-link-preview[v1.6.0, ..., v1.6.1] require flarum/core ^1.8 -> found flarum/core[v1.8.0, ..., v1.8.13] but it conflicts with your root composer.json require (^2.0).
- Root composer.json requires datlechin/flarum-link-preview * -> satisfiable by datlechin/flarum-link-preview[v0.1.0, ..., v0.2.2, v1.0.0, ..., v1.6.1].
Use the option --with-all-dependencies (-W) to allow upgrades, downgrades and removals for packages currently locked to specific versions.