Expand test coverage

[mrfelton]

This pull request includes changes to improve the fee calculation in the src/util.ts file and updates to the GitHub workflows. The most crucial changes are the addition of a feeMinimum parameter to several functions to calculate the minimum fee, renaming of the .github/workflows/dev.yml to .github/workflows/main.yml, and ignoring the master branch in the .github/workflows/test.yml file. The tests in test/unit.test.ts have also been updated to reflect the changes made in src/util.ts.

GitHub Workflows:

• .github/workflows/main.yml: The dev.yml workflow file was renamed to main.yml and the workflow name was changed from Dev to Main.
• .github/workflows/test.yml: The Test workflow was updated to ignore the master branch.

Fee Calculation:

• src/util.ts: The getEstimates() function was updated to calculate the feeMinimum and log it. The extractMempoolFees() function was modified to take an additional depth parameter. The calculateFees() function was updated to take an additional feeMinimum parameter and use it in the filterEstimates() function. [1] [2] [3] [4] [5]

Tests:

• test/unit.test.ts: The tests were updated to import additional functions from src/util.ts and test data was defined. New tests were added for the filterEstimates(), extractMempoolFees(), and calculateFees() functions. The addFeeEstimates() test was updated to use the new test data.