fix: namespace shoud not start with number

package.json

@@ -28,9 +28,8 @@
   "license": "MIT",
   "dependencies": {
     "fs-extra": "^7.0.1",
-    "hash-sum": "^1.0.2",
     "lodash": "^4.17.11",
-    "ts-morph": "^1.3.3",
+    "ts-morph": "^2.0.1",
     "typescript": "^3.4.3",
     "yargs": "^13.2.2"
   },

src/index.ts

@@ -6,8 +6,8 @@
 import fs from 'fs-extra';
 import path from 'path';
 import * as ts from 'typescript';
-import hash from 'hash-sum';
 import {Project} from 'ts-morph';
+import {upperFirst} from 'lodash';
 
 import * as emitter from './emitter';
 import {CompilerState} from './types';
@@ -34,6 +34,14 @@ const defaultOptions = {
     customTransformers: []
 };
 
+const getRandomString = n => Array(n)
+    .join()
+    .split(',')
+    .map(function() {
+        return s.charAt(Math.floor(Math.random() * s.length));
+    }).join('');
+
+
 export function compile(filePath: string, options: Ts2phpOptions = {}) {
 
     const project = new Project({
@@ -99,7 +107,7 @@ export function compile(filePath: string, options: Ts2phpOptions = {}) {
         moduleDefaultImports: {},
         namespace: (options && options.namespace)
             || (options && options.getNamespace && options.getNamespace())
-            || hash(filePath),
+            || upperFirst(getRandomString(5)),
         plugins
     });