Swedish, publishable and GDPR safe number series (#78)

* Swedish, publishable and GDPR safe number series

@see https://www.pts.se/sv/bransch/telefoni/nummer-och-adressering/telefonnummer-for-anvandning-i-bocker-och-filmer-etc/

(Unable to find an English translation)

* Update docs/locales/sv_SE.md

* Update docs/locales/sv_SE.md

Co-authored-by: Bram <bram@ceulemans.dev>

Author: tanthammar

docs/locales/sv_SE.md

@@ -29,3 +29,20 @@ echo $faker->mobileNumber(); // "07########"
 echo $faker->mobileNumber(); // "07## ## ## ##"
 echo $faker->mobileNumber(); // "07## ### ###"
 ```
+
+### Publishable and GDPR safe number series
+
+The [Swedish Post and Telecom Authority (PTS) has reserved a series of numbers](https://www.pts.se/sv/bransch/telefoni/nummer-och-adressering/telefonnummer-for-anvandning-i-bocker-och-filmer-etc/) that are safe to use in relation to European GDPR laws.
+<br>The numbers will never be used by any subscriber wich also makes them safe to publish in books, movies, TV series etc. 
+
+```php
+//Publishable Swedish mobile phone number series
+echo '070-1740' . $faker->faker->numberBetween(605, 699);
+
+//Publishable Swedish landline phone number series
+echo '031-3900' . $faker->numberBetween(600, 699);
+echo '040-6280' . $faker->numberBetween(400, 499);
+echo '08-46500' . $faker->numberBetween(400, 499);
+echo '0980-319' . $faker->numberBetween(200, 299);
+```
+