STR adapter should not hardcode `const` into script content (#3417)
STR adapter should not hardcode `const` into script content (#3417)

A `const` in a string literal like this won't be correctly transpiled
by babel, so we'll be limited by the browser support matrix for
`const`

Fix: harcode a `var` here to be more permissive and widely supported
ImproveDigital/Prebid.js,polluxnetwork/Prebid.js,HuddledMasses/Prebid.js,PubWise/Prebid.js,prebid/Prebid.js,passit/Prebid.js,mcallari/Prebid.js,Adikteev/Prebid.js,gumgum/Prebid.js,gumgum/Prebid.js,Niksok/Prebid.js,PubWise/Prebid.js,tchibirev/Prebid.js,PubWise/Prebid.js,varashellov/Prebid.js,polluxnetwork/Prebid.js,Niksok/Prebid.js,HuddledMasses/Prebid.js,PWyrembak/Prebid.js,Niksok/Prebid.js,PWyrembak/Prebid.js,tchibirev/Prebid.js,prebid/Prebid.js,Adikteev/Prebid.js,ImproveDigital/Prebid.js,olafbuitelaar/Prebid.js,olafbuitelaar/Prebid.js,PWyrembak/Prebid.js,prebid/Prebid.js,gumgum/Prebid.js,ImproveDigital/Prebid.js,passit/Prebid.js,mcallari/Prebid.js,HuddledMasses/Prebid.js,varashellov/Prebid.js