fix(faker): specify refDate to fix value of faker.date.past()

As shown in the following code, the result changes even if the seed is added:
```
> const { faker } = require("@faker-js/faker")
undefined
> faker.seed(0)
0
> const a = faker.date.past().toISOString()
undefined
> a
'2022-03-08T21:45:15.158Z'
> faker.seed(0)
0
> const b = faker.date.past().toISOString()
undefined
> b
'2022-03-08T21:45:30.411Z'
> a === b
false
```

This is because the default refDate passed in the second argument of faker.date.past() is now, so we can fix it at a specific date.

ref: faker-js/faker#859

src/index.ts

@@ -155,8 +155,8 @@ const getNamedType = (opts: Options<NamedTypeNode>): string | number | boolean =
                         if (!customScalar || !customScalar.generator) {
                             if (foundType.name === 'Date') {
                                 return opts.dynamicValues
-                                    ? `faker.date.past().toISOString()`
-                                    : `'${faker.date.past().toISOString()}'`;
+                                    ? `faker.date.past(1, new Date(2022, 0)).toISOString()`
+                                    : `'${faker.date.past(1, new Date(2022, 0)).toISOString()}'`;
                             }
                             return opts.dynamicValues ? `faker.lorem.word()` : `'${faker.lorem.word()}'`;
                         }