chore(release): publish

See merge request !478

Fix missing dependencies

See merge request !479

Previously errors were nested in pubsweet-server. Since they get used all over the place, they're
not living in their own package called @pubsweet/errors.

BREAKING CHANGE: If you required errors deeply from pubsweet-server before, i.e.
`pubsweet-server/src/errors`, this will no longer work, and you need to change your require to
`@pubsweet/errors`.

 - @pubsweet/base-model@2.0.0
 - pubsweet@3.1.1
 - pubsweet-client@8.0.2
 - @pubsweet/coko-theme@5.0.5
 - pubsweet-components@12.0.0
 - @pubsweet/db-manager@2.2.1
 - @pubsweet/default-theme@4.0.5
 - @pubsweet/errors@2.0.0
 - jest-environment-db@2.0.1
 - @pubsweet/logger@0.2.10
 - @pubsweet/models@0.1.1
 - pubsweet-server@12.0.0
 - pubsweet-sse@1.0.4
 - @pubsweet/styleguide@5.0.1
 - @pubsweet/ui-toolkit@2.0.5
 - @pubsweet/ui@9.1.1
 - @pubsweet/component-aws-s3@1.2.3
 - pubsweet-component-blog@1.0.8
 - @pubsweet/component-email-templating@0.1.2
 - pubsweet-component-epub@0.5.8
 - pubsweet-component-form-group@2.0.1
 - pubsweet-component-html@0.2.10
 - pubsweet-component-ink-backend@0.2.17
 - pubsweet-component-login@1.2.6
 - pubsweet-component-navigation@1.0.6
 - pubsweet-component-password-reset-backend@2.0.1
 - pubsweet-component-password-reset-frontend@3.0.5
 - @pubsweet/component-polling-client@0.0.4
 - pubsweet-component-posts-manager@1.0.50
 - @pubsweet/component-send-email@0.2.6
 - pubsweet-component-signup@1.0.39
 - pubsweet-component-sortable-list@0.1.6
 - pubsweet-component-teams-manager@1.1.32
 - pubsweet-component-users-manager@2.0.4
 - @pubsweet/model-blog@0.0.3
 - @pubsweet/model-blogpost@0.0.3
 - @pubsweet/model-collection@3.0.0
 - @pubsweet/model-fragment@2.0.0
 - @pubsweet/model-team@1.0.2
 - @pubsweet/model-user@3.0.0
 - xpub-connect@2.0.5
 - pubsweet-component-xpub-dashboard@4.0.5
 - xpub-edit@2.5.8
 - pubsweet-component-xpub-find-reviewers@0.0.22
 - pubsweet-component-xpub-formbuilder@1.0.5
 - pubsweet-component-xpub-manuscript@0.6.6
 - pubsweet-component-xpub-review-backend@1.0.0
 - pubsweet-component-xpub-review@4.0.5
 - xpub-selectors@0.2.6
 - pubsweet-component-xpub-submit@5.0.5
 - pubsweet-component-xpub-teams-manager@1.0.5
 - xpub-with-context@0.1.6