History of Pool::settle 2 changes

In crates/flow/src/cache.rs, lines 245–254 on v0.2.0. Every change that wrote or deleted one of these lines, or deleted a line from between them. Exact, because each line keeps its identity across edits; edits elsewhere in the file are not here. Also: oxy log -L 245,254:crates/flow/src/cache.rs.