Update sparqljs to newest version
Our copy of the SPARQL.js library is severely outdated, not having been
updated since it was first introduced back in 2016 (change Ia43bcd463b,
commit e4475df7df). We can’t use the npmjs package directly (it’s only
suitable for Node.js), but let’s at least update to a new version: from
(presumably) 1.1.4 to 2.2.1.
Generated with the following commands:
npm install -g browserify terser npm install sparqljs browserify --standalone sparqljs node_modules/sparqljs/sparql.js | \ terser >| \