In Nim 2.0, relative `import` paths are validated more strictly; this fixes the incorrect paths used in some tests.
In Nim 1.6, `{.raises: [Defect].}` is no longer necessary. Remove it.
Other changes: * More optimal search for TTD block. * Add timeouts to all REST requests during trusted node sync. Fixes #4037 * Removed support for storing a deposit snapshot in the network metadata.