prevent npm-tests from silently failing by adding cli-flag --unhandled-rejections=strict to npm tests. (sql-js#472)

Author: kaizhu256

package.json

@@ -25,11 +25,11 @@
 		"test": "npm run lint && npm run test-asm && npm run test-asm-debug && npm run test-wasm && npm run test-wasm-debug && npm run test-asm-memory-growth",
 		"lint": "eslint .",
 		"prettify": "eslint . --fix",
-		"test-asm": "node test/all.js asm",
-		"test-asm-debug": "node test/all.js asm-debug",
-		"test-asm-memory-growth": "node test/all.js asm-memory-growth",
-		"test-wasm": "node test/all.js wasm",
-		"test-wasm-debug": "node test/all.js wasm-debug",
+		"test-asm": "node --unhandled-rejections=strict test/all.js asm",
+		"test-asm-debug": "node --unhandled-rejections=strict test/all.js asm-debug",
+		"test-asm-memory-growth": "node --unhandled-rejections=strict test/all.js asm-memory-growth",
+		"test-wasm": "node --unhandled-rejections=strict test/all.js wasm",
+		"test-wasm-debug": "node --unhandled-rejections=strict test/all.js wasm-debug",
 		"doc": "jsdoc -c .jsdoc.config.json"
 	},
 	"homepage": "http://github.com/sql-js/sql.js",