Temporarily ignore `Dismax::explanation()` test

Since a DisMaxQuery is a combination of TermQuery items,
trying to `explain()` it triggers a bug in tantivy that
leads to a crash in debug builds.

Upstream issue: tantivy-search/tantivy#915

Id: 8e231cbf5b1cc537d2d18180c11b493a5563d700
Author: Caio
Commit time: 2020-11-01T11:02:03+01:00

Modified tique/src/dismax.rs

@@ -306,6 +306,7
}

#[test]
+ #[ignore = "TermQuery::explain bug triggers a debug_assert! crash. Fix at tantivy rev 730ccefffb"]
fn explaination() -> Result<()> {
let mut builder = SchemaBuilder::new();
let field = builder.add_text_field("field", TEXT);