Add nyc test coverage tool

contracts/clients/.gitignore

@@ -1,3 +1,4 @@
 /node_modules
 /dist
 yarn-error.log
+/.nyc_output

contracts/clients/.nycrc

@@ -0,0 +1,5 @@
+{
+  "extends": "@istanbuljs/nyc-config-typescript",
+  "all": true,
+  "include": ["src/**/*.ts"]
+}

contracts/clients/package.json

@@ -15,7 +15,7 @@
   "scripts": {
     "build": "rm -rf dist && mkdir dist && cp -rH typechain-types dist/typechain-types && find ./dist/typechain-types -type f \\! -name '*.d.ts' -name '*.ts' -delete && tsc",
     "watch": "tsc -w",
-    "test": "mocha --require ts-node/register --require source-map-support/register --require ./test/init.ts **/*.test.ts",
+    "test": "nyc mocha --require ts-node/register --require source-map-support/register --require ./test/init.ts --recursive **/*.test.ts",
     "premerge": "yarn test",
     "publish-experimental": "node scripts/showVersion.js >.version && npm version $(node scripts/showBaseVersion.js)-$(git rev-parse HEAD | head -c7) --allow-same-version && npm publish --tag experimental && npm version $(cat .version) && rm .version",
     "publish-experimental-dry-run": "node scripts/showVersion.js >.version && npm version $(node scripts/showBaseVersion.js)-$(git rev-parse HEAD | head -c7) --allow-same-version && npm publish --tag experimental --dry-run && npm version $(cat .version) && rm .version"
@@ -26,12 +26,14 @@
     "node-fetch": "2.6.7"
   },
   "devDependencies": {
+    "@istanbuljs/nyc-config-typescript": "^1.0.2",
     "@types/chai": "^4.3.4",
     "@types/chai-as-promised": "^7.1.5",
     "@types/mocha": "^10.0.1",
     "chai": "^4.3.7",
     "chai-as-promised": "^7.1.1",
     "mocha": "^10.2.0",
+    "nyc": "^15.1.0",
     "source-map-support": "^0.5.21",
     "ts-node": "^10.9.1",
     "typescript": "^4.9.4"