SQLite WebAssembly micro-benchmark and new build with a memory leak fix (#70)

lib/sql-js/benchmark/package.json

@@ -0,0 +1,23 @@
+{
+  "name": "sqlite-webassembly-microbenchmark",
+  "private": true,
+  "dependencies": {
+    "@babel/core" : "^7.14.8",
+    "babel-loader": "^8.2.2",
+    "benchmark": "^2.1.4",
+    "lodash": "^4.17.4",
+    "papaparse": "^5.3.1",
+    "mocha": "^9.0.3",
+    "karma": "^6.3.4",
+    "karma-chrome-launcher": "^3.1.0",
+    "karma-firefox-launcher": "^2.1.1",
+    "karma-json-to-file-reporter" : "^1.0.1",
+    "karma-mocha": "^2.0.1",
+    "karma-webpack": "^4.0.2",
+    "webpack": "^4.46.0",
+    "sql.js": "file:./lib"
+  },
+  "scripts": {
+    "benchmark": "karma start karma.conf.js"
+  }
+}