deps: update reqwest requirement from 0.11.16 to 0.12.7 #610

Job	Run time
rustfmt	9s
benchmarks	2m 6s
clippy	58s
documentation	1m 17s
Miri	2m 29s
Optional features (approx selected)	35s
Optional features (none selected)	35s
static SuiteSparse (stable, ubuntu-20.04, stable)	37s
test (msrv, ubuntu-20.04, 1.77.0)	1m 7s
static SuiteSparse (macos, macos-latest, stable)	46s
test (stable, ubuntu-20.04, stable)	1m 2s
static SuiteSparse (win-msvc, windows-2019, stable)	1m 18s
static SuiteSparse (win-gnu, windows-2019, stable)	1m 18s
test (beta, ubuntu-20.04, beta)	1m 18s
test (nightly, ubuntu-20.04, nightly)	1m 2s
test (macos, macos-latest, stable)	56s
test (win-msvc, windows-2019, stable)	2m 39s
test (win-gnu, windows-2019, stable)	3m 21s
	23m 33s

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