fix(operators): $contains escaping (#7965)

Wrong escaping of text in array (' should escape as '', not \').

Closes #7950 

lib/sql-string.js

@@ -41,7 +41,7 @@ function escape(val, timeZone, dialect, format) {
   if (Array.isArray(val)) {
   if (Array.isArray(val)) {
     const partialEscape = _.partial(escape, _, timeZone, dialect, format);
     const partialEscape = _.partial(escape, _, timeZone, dialect, format);
     if (dialect === 'postgres' && !format) {
     if (dialect === 'postgres' && !format) {
-      return dataTypes.ARRAY.prototype.stringify(val, {escape});
+      return dataTypes.ARRAY.prototype.stringify(val, {escape: partialEscape});
     }
     }
     return val.map(partialEscape);
     return val.map(partialEscape);
   }
   }

test/unit/dialects/postgres/query-generator.test.js

@@ -414,6 +414,10 @@ if (dialect.match(/^postgres/)) {
           arguments: ['myTable', {where: { field: new Buffer('Sequelize')}}],
           arguments: ['myTable', {where: { field: new Buffer('Sequelize')}}],
           expectation: "SELECT * FROM \"myTable\" WHERE \"myTable\".\"field\" = E'\\\\x53657175656c697a65';",
           expectation: "SELECT * FROM \"myTable\" WHERE \"myTable\".\"field\" = E'\\\\x53657175656c697a65';",
           context: QueryGenerator
           context: QueryGenerator
+        }, {
+          title: 'string in array should escape \' as \'\'',
+          arguments: ['myTable', {where: { aliases: {$contains: ['Queen\'s']} }}],
+          expectation: "SELECT * FROM \"myTable\" WHERE \"myTable\".\"aliases\" @> ARRAY['Queen''s'];",
         },
         },
 
 
         // Variants when quoteIdentifiers is false
         // Variants when quoteIdentifiers is false