Safe Apps Dev Tools Release 5

Changes:

Safe Apps SDK v2.0.0

• Throw an error if transaction is not found in sdk.txs.getBySafeTxHash (#96)

Safe Apps React SDK v2.0.0

• use Safe Apps SDK v2.0.0

Safe Apps CRA Template v3.0.0

• use Safe Apps React SDK v2.0.0
• Bump react-scripts bersion

Safe Apps Ethers Provider v0.1.0

• use Safe Apps SDK v2.0.0
• Add ethers.js signer