add conflux espace mainnet and testnet (#80) #290

Job	Run time
clippy	14s
feature-checks	18s
test stable --no-default-features	13s
miri --no-default-features	37s
test stable	24s
wasm	19s
miri	33s
docs	18s
test stable --all-features	21s
miri --all-features	52s
test beta --no-default-features	12s
fmt	10s
test beta	12s
test beta --all-features	20s
test nightly --no-default-features	12s
test nightly	12s
test nightly --all-features	19s
test 1.70 --no-default-features	16s
test 1.70	12s
	6m 14s

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