* fix: specify precision for net_amount
* fix: correct existing test to account for precision
* fix: rounding issue in test cases
* fix: optional grand total manipulation
* fix: use `grand_total_diff` for manipulation
* fix: patch to set default for grand total manipulation
* fix: wrong rounding assertion for USD
* fix: undefined this.frm error
* chore: linters
* fix: `net_amount` percision and method rename
* fix: missing frm reference
* chore: minor cleanups and depr message
* refactor: remove optional adjusting of grand total
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