test: Update the rgbpp-sdk version used in examples to v0.3.0

[Flouse]

Search

https://github.com/search?q=repo%3Ackb-cell%2Frgbpp-sdk+0.1.0&type=code

References

• https://github.com/ckb-cell/rgbpp-sdk/releases/tag/v0.3.0
• Bump RGB++ SDK to v0.2.0 #194
• Merge release/0.2.0 to main branch #195
• https://github.com/ckb-cell/rgbpp-sdk/releases
• https://www.npmjs.com/package/rgbpp/v/0.2.0

[Dawn-githup]

#220