Fixes WASM compilation

lib/src/model/xsd/date_time.rs

@@ -1345,7 +1345,7 @@ impl Timestamp {
 fn since_unix_epoch() -> Result<Duration, DateTimeError> {
     Ok(Duration::new(
         0,
-        Decimal::from_f64(js_sys::Date::now() / 1000.),
+        Decimal::from_double((js_sys::Date::now() / 1000.).into()),
     ))
 }
 

lib/src/sparql/xml_results.rs

@@ -546,7 +546,7 @@ impl<R: BufRead> ResultsIterator<R> {
                                 new_bindings[*var] = term.take()
                             } else {
                                 return Err(
-                                    invalid_data_error(format!("The variable '{}' is used in a binding but not declared in the variables list",  self.reader.decode(&var).map_err(map_xml_error)?)).into()
+                                    invalid_data_error(format!("The variable '{}' is used in a binding but not declared in the variables list",  self.reader.decode(var).map_err(map_xml_error)?)).into()
                                 );
                             }
                         } else {

lib/src/storage/fallback_backend.rs

@@ -1,7 +1,6 @@
 use std::collections::btree_map::Entry;
 use std::collections::BTreeMap;
 use std::io::Result;
-use std::path::Path;
 use std::sync::{Arc, Mutex, RwLock};
 
 #[derive(Clone)]