Updating leapkit/core

Adopting server.Errorf in home/index.go
Fixing templates not running pragmas

Merge pull request #46 from leapkit/feature-errorf-validators

feature: adding errorf and url, email validtors

task: updating core version on the template

task: updating core version on the template

Merge pull request #44 from tatang26/custom-error-pages

task: Custom error pages

task: updating some deps

Updating core dependency

core: using latest core

Updating core dependency

fix: running migrations before RunMigrationsDir