chore: update web components polyfill to version 2.1.0
chore: update web components polyfill to version 2.1.0

includes fixes for symbols that prevents older browsers from running out
of stack space.

cousquer/uPortal,jonathanmtran/uPortal,ChristianMurphy/uPortal,bjagg/uPortal,groybal/uPortal,Jasig/uPortal,bjagg/uPortal,ChristianMurphy/uPortal,Jasig/uPortal,cousquer/uPortal,groybal/uPortal,GIP-RECIA/esco-portail,bjagg/uPortal,groybal/uPortal,jonathanmtran/uPortal,groybal/uPortal,Jasig/uPortal,GIP-RECIA/esco-portail,groybal/uPortal,GIP-RECIA/esco-portail,ChristianMurphy/uPortal,mgillian/uPortal,cousquer/uPortal,mgillian/uPortal,mgillian/uPortal,jonathanmtran/uPortal