Fix inability to stake the max amount

[Radiokot]

Purpose

Fix inability to stake the max amount.

Changes

• Fixed fee estimation for earn transactions
• Fixed delegation transaction reserving more energy than required
• Updated Concordium SDK to 10.0.1

Checklist

• My code follows the style of this project.
• The code compiles without warnings.
• I have performed a self-review of the changes.
• I have documented my code, in particular the intent of the
  hard-to-understand areas.
• (If necessary) I have updated the CHANGELOG.