Bump follow-redirects from 1.15.2 to 1.15.4 in /examples/wasm/www #989

Job	Run time
Compute binary sizes	1m 0s
Build documentation	16s
Fuzz test (fill_first_fit)	1m 26s
Build benchmarks	44s
Fuzz test (fill_optimal_fit)	1m 18s
Fuzz test (fill_fast_path)	1m 17s
Fuzz test (wrap_first_fit)	1m 21s
Ubuntu (stable, no default features)	23s
Fuzz test (wrap_optimal_fit)	1m 17s
Ubuntu (stable, all features)	38s
Minimum supported Rust version (no default features)	1m 54s
Build Wasm demo	18s
Fuzz test (wrap_optimal_fit_usize)	1m 33s
Ubuntu (stable, default features)	24s
Minimum supported Rust version (all features)	2m 9s
Fuzz test (wrap_fast_path)	1m 17s
Ubuntu (nightly, no default features)	29s
Minimum supported Rust version (default features)	1m 56s
Fuzz test (unfill)	1m 22s
Windows (stable, default features)	55s
Ubuntu (nightly, all features)	36s
Fuzz test (refill)	1m 16s
Ubuntu (nightly, default features)	28s
Deploy Wasm demo	0s
	24m 17s

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