Add locale for es-PE

[jmcastagnetto]

Lists of the usual public holidays can be found in

• https://en.wikipedia.org/wiki/Public_holidays_in_Peru
• https://www.officeholidays.com/countries/peru/2020
• https://publicholidays.pe/2020-dates/

Also, this website lists all the extra holidays that could've been decreed on a given year:

• https://www.timeanddate.com/holidays/peru/

[jmcastagnetto]

Here are the national holidays for 2022:

define holidays:
  es-PE:
    2022_01_01 = Año Nuevo
    2022_04_14 = Jueves (Semana Santa)
    2022_04_15 = Viernes (Semana Santa)
    2022_04_16 = Sábado (Semana Santa)
    2022_04_17 = Domingo (Semana Santa)
    2022_05_01 = Día del Trabajo
    2022_05_08 = Día de la Madre
    2022_06_07 = Día de la Bandera
    2022_06_19 = Día del Padre
    2022_06_29 = San Pedro y San Pablo
    2022_07_28 = Día de la Independencia
    2022_07_29 = Día de la Independencia
    2022_08_06 = Batall de Junín
    2022_08_30 = Santa Rosa de Lima
    2022_10_08 = Combate de Angamos
    2022_11_01 = Día de Todos los Santos
    2022_12_08 = Inmaculada Concepción
    2022_12_09 = Batalla de Ayacucho
    2022_12_25 = Navidad