Update anchor.js to v2.0.0.
Update anchor.js to v2.0.0.

[ci skip]

Hightrack/bootstrap,yuyokk/bootstrap,JumpLinkNetwork/bootstrap-backward,joblocal/bootstrap,copperdesign/bootstrap,hellonewman81/bs4,copperdesign/bootstrap,slavanga/bootstrap,joblocal/bootstrap,9-chirno/chirno,realcrowd/bootstrap,Delagen/bootstrap,vsn4ik/bootstrap,n054/bootstrap,NCARB/bootstrap,seanwu99/bootstrap,igoynawamreh/bootstrap,mpharrigan/bootstrap,creativewebjp/bootstrap,hebbet/bootstrap,peterblazejewicz/bootstrap,coliff/bootstrap,creativewebjp/bootstrap,kvlsrg/bootstrap,tjkohli/bootstrap,jipexu/bootstrap,SweetProcess/bootstrap,fschumann1211/bootstrap,davethegr8/bootstrap,gijsbotje/bootstrap,andresgalante/bootstrap,tomlutzenberger/bootstrap,wesamco/bootstrap-rtl,johnajacob/bootstrap,Delagen/bootstrap,vitaligent/4,kvlsrg/bootstrap,nice-fungal/bootstrap,NCARB/bootstrap,Lyricalz/bootstrap,fschumann1211/bootstrap,wesamco/bootstrap-rtl,david-schopf/bootstrap,IdanCo/bootstrap,jipexu/bootstrap,NCARB/bootstrap,davethegr8/bootstrap,tibo66/bootstrap,creativewebjp/bootstrap,yuyokk/bootstrap,sealocal/bootstrap,bootstrapbrasil/bootstrap,zalog/bootstrap,janseliger/bootstrap,edanbarak/bootstrap,abvalentine/bootstrap,creativewebjp/bootstrap,jipexu/bootstrap,lemuelbarango/bootstrap,lemuelbarango/bootstrap,sealocal/bootstrap,onenameio/rhythm-bootstrap,yuyokk/bootstrap,urbit/bootstrap,hebbet/bootstrap,SweetProcess/bootstrap,peterblazejewicz/bootstrap,supergibbs/bootstrap,bardiharborow/bootstrap,Hightrack/bootstrap,janseliger/bootstrap,urbit/bootstrap,abvalentine/bootstrap,peterblazejewicz/bootstrap,9-chirno/chirno,xt0rted/bootstrap,frostbitten/bootstrap,Hightrack/bootstrap,TheFridayInstitute/bootstrap,wesamco/bootstrap-rtl,sealocal/bootstrap,lipis/bootstrap,lipis/bootstrap,tomlutzenberger/bootstrap,SweetProcess/bootstrap,lemuelbarango/bootstrap,frostbitten/bootstrap,xt0rted/bootstrap,TheFridayInstitute/bootstrap,Delagen/bootstrap,twbs/bootstrap,supergibbs/bootstrap,urbit/bootstrap,NCARB/bootstrap,onenameio/rhythm-bootstrap,abvalentine/bootstrap,blockstack/blockstack-bootstrap,nice-fungal/bootstrap,lipis/bootstrap,GerHobbelt/bootstrap,realcrowd/bootstrap,JumpLinkNetwork/bootstrap-backward,davethegr8/bootstrap,inway/bootstrap,gijsbotje/bootstrap,stanwmusic/bootstrap,fschumann1211/bootstrap,tibo66/bootstrap,mpharrigan/bootstrap,hebbet/bootstrap,n054/bootstrap,blockstack/blockstack-bootstrap,9-chirno/chirno,n054/bootstrap,david-schopf/bootstrap,abvalentine/bootstrap,tibo66/bootstrap,johnajacob/bootstrap,coliff/bootstrap,joblocal/bootstrap,tjkohli/bootstrap,edanbarak/bootstrap,twbs/bootstrap,stanwmusic/bootstrap,copperdesign/bootstrap,vitaligent/4,fschumann1211/bootstrap,seanwu99/bootstrap,edanbarak/bootstrap,wesamco/bootstrap-rtl,JumpLinkNetwork/bootstrap-backward,tagliala/bootstrap,gijsbotje/bootstrap,GerHobbelt/bootstrap,Lyricalz/bootstrap,bootstrapbrasil/bootstrap,janseliger/bootstrap,Lyricalz/bootstrap,vsn4ik/bootstrap,bardiharborow/bootstrap,onenameio/rhythm-bootstrap,hellonewman81/bs4,bardiharborow/bootstrap,slavanga/bootstrap,afuno/bootstrap,TheFridayInstitute/bootstrap,Hemphill/bootstrap-docs,supergibbs/bootstrap,Hemphill/bootstrap-docs,bootstrapbrasil/bootstrap,vitaligent/4,m5o/bootstrap,tagliala/bootstrap,seanwu99/bootstrap,IdanCo/bootstrap,janseliger/bootstrap,gijsbotje/bootstrap,afuno/bootstrap,nice-fungal/bootstrap,mpharrigan/bootstrap,hellonewman81/bs4,supergibbs/bootstrap,sealocal/bootstrap,Scoutski/bootstrap,hebbet/bootstrap,frostbitten/bootstrap,zalog/bootstrap,n054/bootstrap,davethegr8/bootstrap,igoynawamreh/bootstrap,slavanga/bootstrap,Hemphill/bootstrap-docs,andresgalante/bootstrap,afuno/bootstrap,vsn4ik/bootstrap,joblocal/bootstrap,Delagen/bootstrap,andresgalante/bootstrap,slavanga/bootstrap,inway/bootstrap,tagliala/bootstrap,xt0rted/bootstrap,yuyokk/bootstrap,TheFridayInstitute/bootstrap,kvlsrg/bootstrap,GerHobbelt/bootstrap,andresgalante/bootstrap,vsn4ik/bootstrap,IdanCo/bootstrap,9-chirno/chirno,SweetProcess/bootstrap,copperdesign/bootstrap,lemuelbarango/bootstrap,tibo66/bootstrap,johnajacob/bootstrap,Lyricalz/bootstrap,edanbarak/bootstrap,seanwu99/bootstrap,Scoutski/bootstrap,bardiharborow/bootstrap,tomlutzenberger/bootstrap,Scoutski/bootstrap,jipexu/bootstrap,xt0rted/bootstrap,igoynawamreh/bootstrap,zalog/bootstrap,stanwmusic/bootstrap,igoynawamreh/bootstrap,Hemphill/bootstrap-docs,m5o/bootstrap,david-schopf/bootstrap,afuno/bootstrap,JumpLinkNetwork/bootstrap-backward,lipis/bootstrap,IdanCo/bootstrap,stanwmusic/bootstrap,inway/bootstrap,realcrowd/bootstrap,realcrowd/bootstrap,frostbitten/bootstrap,blockstack/blockstack-bootstrap,johnajacob/bootstrap,Scoutski/bootstrap