Update dependency ldk_node to v0.3.0

[renovate]

This PR contains the following updates:

Package	Type	Update	Change
ldk_node	dependencies	minor	0.2.0 -> 0.3.0

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Release Notes

LtbLightning/ldk-node-flutter (ldk_node)

v0.3.0

Updated flutter_rust_bridge to 2.0.0.

APIs added

• buildWithFsStore method is added in the Builder class allowing to use the filesystem storage backend.
• Exposed setLiquiditySourceLsps2 method to Builder to configure the Node instance to source the inbound liquidity.
• nextEventAsync method is added to Node class that allows polling the event queue asynchronously.
• status method has been added to Node allowing to retrieve information about the Node's status.
• config method added to get the config with which the Node was initialized.
• The payment APIs have been restructured to use per-type (bolt11, onchain, bolt12) payment handlers which can be accessed via node.{type}Payment.
• Support for sourcing inbound liquidity via LSPS2 just-in-time (JIT) channels has been added.
• Support for creating and paying BOLT12 offers and refunds has been added.
• Added networkGraph handler method allowing to query the network graph.
• Added forceCloseChannel to Node class.

API changed

• All available balances outside of channel balances are now exposed via a unified listBalances interface method.

Fixed

Persisted peers are now correctly reconnected after startup.

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