Upgrade tsup from 6.7.0 to 8.1.0

[petertonysmith94]

Summary

The following dependabot upgrade PR was closed due to a failing CI for a single test file (json.test.ts).

This is due to using the following logic in the normalizeJson function:

fuels-ts/packages/account/src/providers/utils/json.ts

Line 13 in 0c63dc0

switch (object[key]?.constructor.name) {

The upgrade has caused the constructor name to change, therefore breaking the logic of detection for these entities.

We need to

• Reinstate the tsup upgrade via build(deps-dev): bump tsup from 6.7.0 to 8.1.0 #2658
• Find a more reliable means for detecting object types
• Make appropriate changes to json.ts