Update diesel to 2.2.10

[Kobzol]

Icounts got ~2x slower:

time -p CARGO_INCREMENTAL=0 cargo check ; cargo clean
# 5.58 (generated more than 300 warnings!)
# 10.69

time -p CARGO_INCREMENTAL=0 cargo build ; cargo clean
# 5.85
# 11.15

time -p CARGO_INCREMENTAL=0 cargo build --release ; cargo clean
# 6.20
# 11.48

Related issue: #2024

[nnethercote]

5.58 (generated more than 300 warnings!)

:(

[Kobzol]

5.58 (generated more than 300 warnings!)

:(

Well, it's a good thing, now those warnings will be gone :)