client/asset/dash: Update minNetworkVersion to v19.2.0.

[dev-warrior777]

Dash v19.2.0

Dash Core 19.2.0 is a mandatory minor version that does include breaking changes. You can find detailed release notes at https://github.com/dashpay/dash/blob/v19.2.0/doc/release-notes.md.

When upgrading from a version < 19.2, a migration process will occur. Although expected to complete quite quickly, this migration process can take up to thirty minutes to complete on some systems.

This release is mandatory for all nodes. Versions < 19.2 are expected to fork off from the rest of the network on July 6th.

[JoeGruffins]

I tried out on simnet and is working there.

Simnet always shows a large immature amount for the alpha wallet. What is that? I guess mined funds? Mined funds do have a long maturity.

[dev-warrior777]

I tried out on simnet and is working there.

Great, thanks.

Simnet always shows a large immature amount for the alpha wallet. What is that? I guess mined funds? Mined funds do have a long maturity.

Specifically for the regest simnet the block reward is huge to make dev life easier I guess ;-)

From Dash docs
> dash-cli -regtest generate 101
Generate 101 blocks using a special RPC which is only available in regtest mode. This takes less than a second on a generic PC. Because this is a new block chain using Dash's default rules, the first blocks pay a block reward of 500 dash. Unlike mainnet, in regtest mode only the first 150 blocks pay a reward of 500 dash. However, a block must have 100 confirmations before that reward can be spent, so we generate 101 blocks to get access to the coinbase transaction from block #1.