fix(sql.js): use the same code path as native to create db file

sql.js 1.x no longer loads synchronously, so it's better to now create the db file the same way as the native driver.

src/index.ts

@@ -6,7 +6,7 @@ import * as knex from 'knex'
 import Model from './model'
 import { runQuery } from './helpers'
 import { toKnexSchema, createTimestampTrigger } from './schema-helpers'
-import { pureConnect, readDatabase } from './sqljs-handler'
+import { pureConnect } from './sqljs-handler'
 import { defaultTo, invariant, makeDirPath } from './util'
 
 import { Pool } from 'generic-pool'
@@ -52,16 +52,15 @@ export class Trilogy {
 
     const config = { client: 'sqlite3', useNullAsDefault: true }
 
-    if (this.isNative) {
-      if (path !== ':memory:') {
-        ensureExists(obj.connection!.filename)
-      }
+    if (path !== ':memory:') {
+      ensureExists(obj.connection!.filename)
+    }
 
+    if (this.isNative) {
       this.knex = knex(({ ...config, connection: obj.connection } as knex.Config))
     } else {
       this.knex = knex(config)
       this.pool = pureConnect(this)
-      readDatabase(this)
     }
 
     this._definitions = new Map()