Add comment field to License table

src/migrations/20190117231524_license-comment-field.js

@@ -0,0 +1,12 @@
+
+exports.up = function(knex, Promise) {
+    return knex.schema.table('License', function (table) {
+        table.string('comment');
+    });
+};
+
+exports.down = function(knex, Promise) {
+    return knex.schema.table('License', function (table) {
+        table.dropColumn('comment');
+    })
+};