fix(sqlite): migration

Author: fiftin

.gitignore

@@ -13,6 +13,7 @@ api/public/**/*
 /config.runner.key
 /.dredd/config.json
 /database.boltdb
+/database.sqlite
 /database.boltdb.lock
 /database_test.boltdb
 .DS_Store

db/sql/migrations/v2.15.1.sqlite.sql

@@ -19,7 +19,7 @@ CREATE TABLE project__environment (
                                       password    VARCHAR(255) NULL,
                                       json        TEXT NOT NULL,
                                       name        VARCHAR(255) NULL,
-                                      env         TEXT NOT NULL
+                                      env         TEXT
 );
 
 CREATE INDEX project__environment__project__environment_project_id