v0.0.74

• feat(cursors): support multiple cursors.
• feat(extensions): install missing extensions by CocInstall.
• feat(extensions): add command extensions.forceUpdateAll.
• feat(completion): rework preselect feature.
• feat(extension): use request for fetch package info.
• feat(language-client): support disableDynamicRegister configuration.
• feat(list): paste from vim register support on insert mode #1088.
• feat(plugin): add CocHasProvider(), close #1087.
• refactor(outline): not exclude variables and callback.
• refactor(diagnostic): remove timeout on InsertLeave.