Bump esptool from 2.8 to 3.1

[dependabot]

Bumps esptool from 2.8 to 3.1.

Release notes

Sourced from esptool's releases.

Version 3.1

New Features

• Support for ESP32-C3 SoC has been added
• Added --encrypt-files option to specify which files need encryption before flashing.
• Added --use_segments option for elf2image to use segments instead of sections to generate the image. (espressif/esptool#546)
• Improved the write_flash timeout calculation and status message.
• Support for detecting ESP8285 versions -N08, -N16, -H08, and -H16 has been added.
• Added support for all write_reg command forms (including delay and mask parameters) to flasher stub.
• Added merge_bin command to combine binary files on host (espressif/esptool#254, espressif/esptool#568)
• Extended the --min-rev argument of elf2image to work on all chips apart from ESP8266.
• Added diagnostic warnings about the memory regions needing to be erased during a flash write (espressif/esptool#306)
• Added --after no_reset_stub option to keep the flasher stub running and allow its repeated usage.
• Added support for the USB-JTAG-Serial peripheral of ESP32-C3.

espsecure.py

• Added custom command-line argument to allow calling from other Python scripts.
• Added --aes-xts option to encrypt/decrypt flash data files with AES-XTS algorithm on the S2 and C3.
• Fixed handling of files to forbid empty output and re-writing input.

espefuse.py

• Added custom command-line argument to allow calling from other Python scripts.
• Added security measures to prevent burning custom multicast MAC address. (espressif/esptool#472)
• Fixed errors when burning and read-protecting an efuse at the same time (espressif/esptool#584)
• Fixed burning of SPI pins configuration efuses (espressif/esptool#216)

Internal features

These features are intended for use inside Espressif:

• Support for ESP32-S3-beta3 & ESP32-C6-beta have been added. These SoCs are not generally available, so they are unsupported in this release. Official support will be added in a later esptool release.
• Support for 32-bit addressing to enable 32/64MB flash memory chips on the S3.

Bug Fixes

• Fixed error outputs when installing from pip.
• Increased the timeout for writing to flash to improve stability (espressif/esptool#577, espressif/esptool#533)
• Fixed failing dump_mem overall bytes read message.
• Allowed the write_mem mask argument to be optional to match with its usage example on Wiki.
• Ensured expand_file_arguments gets called when using custom command-line arguments. (espressif/esptool#400)
• Fixed SecureBoot v2 public key extraction (espressif/esptool#623)

Miscellaneous Changes

• Decomposed port detection logic.
• Added flushing after each command before waiting for a reply.
• Made it easier to use esptool.py as a component by permitting passing an already formed esp object to main() (espressif/esptool#402)

... (truncated)

Commits

• 768fd2c Update to v3.1
• 93b9462 esp32c3: Increase the power off time when burning efuses
• 9305da8 CI: Build and release binaries
• e5f94fa efuse: Update efuse table for esp32s3beta3
• a951bad Decouple esptool.py reset logic for easier monkey patching
• 8bd2ada espsecure: Add test covering generating and extracting a key of version 2
• 8438f69 Fix to properly extract SecureBoot v2 public key
• 152c292 Stub: Add USB-JTAG-Serial support
• 5f60add Esptool: Add USB-JTAG-Serial reset sequence
• 4698b39 espefuse: Increase PWR_OFF_NUM parameter when programming efuses
• Additional commits viewable in compare view

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[dependabot]

Looks like esptool is up-to-date now, so this is no longer needed.