Bump jSerialComm from 2.5.1 to 2.7.0 in /cnf

[dependabot]

Bumps jSerialComm from 2.5.1 to 2.7.0.

Release notes

Sourced from jSerialComm's releases.

jSerialComm v2.6.2

• Set "low latency mode" on Linux, if it exists
• Do not tcdrain before closing port in case port has stopped responding (which causes a freeze)
• Update documentation to indicate that getCommPorts() always returns a new unique array of SerialPort instances

jSerialComm v2.6.1

• Merge Android-specific code into General POSIX codebase
• Deprecated Android architectures removed
• Updated Crosstool-NG config files to work with newer Crosstool version
• Sync/force write data before closing port
• Update error strings to better indicate IO errors
• Only enable BRKINT flag if not in RS485 mode
• Check return value of SetupComm in Windows
• Return boolean value when changing port configurations after opened to indicate success/failure
• Redefine fdatasync to fsync on Mac OS
• Do not completely reset port configuration when updating config parameters
• Updated Javadocs

jSerialComm v2.6.0

• Created new SerialPortMessageListenerWithExceptions class to allow users to handle event-based exceptions
• In Windows, use "CreateProcess" to directly preset DTR/RTS modes instead of calling system()
• Add ability for user to specify whether RTS is high/low when sending in RS485 mode
• Ensure data was actually received in waitForEvent on Windows
• Add additional ARM version indicator for choosing correct native binary
• Additional test case updates
• Use flock() to ensure exclusive port access instead of TIOCEXCL
• Perform full port closure routing upon native error
• Synchronize open/close/setup calls in Java to avoid race conditions
• Officially remove OSX 32-bit support
• Remove isOpened field and detect openness based on file descriptor instead
• Break out of event waiting loop based on Java-side boolean value
• Force-interrupt event waiting thread in case it gets stuck in native/driver code
• Update Gradle build file to use bnd instead of the deprecated osgi plugin

jSerialComm v2.5.3

• Add function calls to get RTS/DTR/RI line statuses (getRTS(), getDTR(), getRI())
• Add functions to attempt to set/retrieve the underlying device driver's transmit buffer sizes
• Suppress output of setting RTS/DTR line states before a port is opened
• Set global read/write/execute permissions on extracted native libraries so multiple instances of jSerialComm can function at the same time
• Tie all "safety sleep" timers to the parameter in openPort() so that every sleep is user-configurable at runtime
• Ensure that ports are fully/automatically closed if it is detected that they are no longer connected
• Check for open ports before reading/writing so that disconnected ports don't continually spit out garbage data
• Properly initialize all C data structs

jSerialComm v2.5.2

• Ensure that a valid file descriptor exists before closing ports
• Add RS-485 mode for drivers that support it
• Reset interrupted state on threads in which interruptions may occur
• Add DataListener class which can inform users when a read/null pointer exception has occurred asynchronously
• Store native code libraries inside a tmp directory instead of the tmp root to cut down on library removal/cleanup time during startup

... (truncated)

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[dependabot]

Superseded by #203.