feat!: Add PoX-2 methods to @stacks/stacking client (#1354)

BREAKING CHANGE:
Remove the getBTCAddress method, since it does not work with modern BTC addresses.
A StackingClient will now automatically detect which PoX version to use for Stacking.
Adds the following PoX Stacking methods to the StackingClient: `stackExtend`, `stackIncrease`, `delegateStackExtend`, `delegateStackIncrease`, `stackAggregationCommitIndexed`, `stackAggregationIncrease`.
Adds the following helper methods to the StackingClient: `getAccountExtendedBalances`, `getAccountBalanceLocked`, `getDelegationStatus`, `getRewardSet`.

configs/jestConfig.js

@@ -0,0 +1,30 @@
+const path = require('path');
+
+if (process.env.SKIP_TESTS) {
+  console.log('Skipping tests...');
+  process.exit(0);
+}
+
+module.exports = packageDirname => {
+  return {
+    rootDir: packageDirname,
+    preset: 'ts-jest',
+    testEnvironment: 'node',
+    coverageDirectory: './coverage/',
+    collectCoverage: true,
+    moduleNameMapper: require('jest-module-name-mapper').default(
+      path.resolve(packageDirname, 'tsconfig.json')
+    ),
+    globals: {
+      'ts-jest': {
+        tsconfig: path.resolve(packageDirname, 'tsconfig.json'),
+        diagnostics: {
+          ignoreCodes: ['TS151001'],
+        },
+      },
+    },
+    moduleFileExtensions: ['js', 'ts', 'd.ts'],
+    setupFilesAfterEnv: [path.resolve(__dirname, 'jestSetup.js')],
+    testTimeout: 10_000,
+  };
+};