Adding all from 11.0 https://github.com/hibou-io/odoo-hr-payroll

hr_payroll_holidays
hr_payroll_input_name_report
hr_payroll_input_report
hr_payroll_payment
hr_payroll_timesheet
hr_payslip_line_date
l10n_us_fl_hr_payroll
l10n_us_hr_payroll
l10n_us_mo_hr_payroll
l10n_us_oh_hr_payroll
l10n_us_va_hr_payroll

hr_payroll_timesheet/hr_contract.py

@@ -0,0 +1,8 @@
+# -*- coding: utf-8 -*-
+from odoo import models, fields
+
+
+class HrContract(models.Model):
+    _inherit = 'hr.contract'
+
+    paid_hourly = fields.Boolean(string="Paid Hourly", default=False)