fix(core): update to rxjs 6 and angular 6

update to rxjs 6 and angular 6

feat(core): release based on Angular Package Format

build(core): update dependencies

fix(core): add missing Observable import

build(webpack): add webpack config

fix(plugins): ie11 compatibility

chore(core): update dependencies

fix(plugin): index.component support BS4.alpha6

fix(plugins): export modules for each plugin

fix(plugins): public variables