Add simple test for transaction TS definition

This commit adds a first simple test for transaction class TypeScript
definitions. Actual test code is not executed, it is just compiled
using the TypeScript compiler to verify correctness of types. Also
added npm script to run TS definition tests `test-types`.

More tests will be added in subsequent commits.

Author: lutovich

package.json

@@ -16,6 +16,7 @@
     "stop-neo4j": "gulp stop-neo4j",
     "run-stress-tests": "gulp run-stress-tests",
     "run-tck": "gulp run-tck",
+    "test-types": "tsc -p ./test/types/tsconfig.json",
     "docs": "esdoc -c esdoc.json",
     "versionRelease": "gulp set --version $VERSION && npm version $VERSION --no-git-tag-version"
   },
@@ -62,6 +63,7 @@
     "semver": "^5.3.0",
     "through2": "~2.0.0",
     "tmp": "0.0.31",
+    "typescript": "^2.3.4",
     "vinyl-buffer": "^1.0.0",
     "vinyl-source-stream": "^1.1.0"
   },

test/types/tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "compilerOptions": {
+    "module": "es6",
+    "target": "es6",
+    "noImplicitAny": true,
+    "noImplicitReturns": true,
+    "strictNullChecks": true,
+    "outDir": "../../build/test/types"
+  },
+  "include": [
+    "v1/*.test.ts",
+    "../../types/**/*"
+  ]
+}

test/types/v1/transaction.test.ts

@@ -0,0 +1,42 @@
+/**
+ * Copyright (c) 2002-2017 "Neo Technology,","
+ * Network Engine for Objects in Lund AB [http://neotechnology.com]
+ *
+ * This file is part of Neo4j.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import Transaction from "../../../types/v1/transaction";
+
+const dummy: any = null;
+
+const tx: Transaction = dummy;
+
+const isOpen: boolean = tx.isOpen();
+console.log(isOpen);
+
+const runResult1 = tx.run("RETURN 1");
+runResult1.then(result => {
+  result.records.forEach(record => {
+    console.log(record);
+  });
+});
+
+tx.commit().catch(error => {
+  console.log(error);
+});
+
+tx.rollback().catch(error => {
+  console.log(error);
+});