v0.4.0

Added

• added ability to specify backup rpc for connecting to the network (#28)
• don't retry on critical errors (query, tx) (#27)

Other

• updates near-* dependencies to 0.28 release. Removed Cargo.lock (#33)
• [breaking] added documentation for root level and signer module (#32)
• added CODEOWNERS (#31)
• removed prelude and filtered entries. (#29)
• replaced SecretBuilder with utility functions (#26)
• [breaking] replaced deploy method as a static method (#18)