pymodbus v3.7.1

• Better error message, when pyserial is missing.
• Slave=0 will return first response, used to identify device address. (#2298)
• Feature/add simulator api skeleton (#2274)
• Correct max. read size for registers. (#2295)
• Ruff complains, due to upgrade. (#2296)
• Properly process 'slaves' argument (#2292)
• Update repl requirement to >= 2.0.4 (#2291)
• Fix aiohttp < 3.9.0 (#2289)
• Simplify framer test setup (#2290)
• Clean up ModbusControlBlock (#2288)
• example docstrings diag_message -> pdu.diag_message (#2286)
• Explain version schema (#2284)
• Add more testing for WriteRegisters. (#2280)
• Proof for issue 2273. (#2277)
• Update simulator tests. (#2276)