chore(templates): add meta protocol v1 to already aligned migration templates

Author: wzrdtales

lib/migration.js

@@ -115,6 +115,10 @@ Migration.prototype.defaultJsTemplate = function() {
     'exports.down = function(db) {',
     '  return null;',
     '};',
+    '',
+    'exports._meta = {',
+    '  "version": 1',
+    '};',
     ''
   ].join('\n');
 };
@@ -177,6 +181,10 @@ Migration.prototype.sqlFileLoaderTemplate = function() {
     '    return db.runSql(data);',
     '  });',
     '};',
+    '',
+    'exports._meta = {',
+    '  "version": 1',
+    '};',
     ''
   ].join('\n');
 };
@@ -242,6 +250,10 @@ Migration.prototype.sqlFileLoaderIgnoreOnInitTemplate = function() {
     '    return db.runSql(data);',
     '  });',
     '};',
+    '',
+    'exports._meta = {',
+    '  "version": 1',
+    '};',
     ''
   ].join('\n');
 };