add migration file for receiver and casebulder table in DB

database/migrations/2018_08_05_062733_add_timestamp_for_receiver.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddTimestampForReceiver extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('Receiver', function (Blueprint $table) {
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('Receiver', function (Blueprint $table) {
+            $table->dropTimestamps();
+        });
+    }
+}

database/migrations/2018_08_05_062842_add_timestamp_for_casebuilder.php

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+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddTimestampForCasebuilder extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('CaseBuilder', function (Blueprint $table) {
+            $table->timestamps();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('CaseBuilder', function (Blueprint $table) {
+            $table->dropTimestamps();
+        });
+    }
+}