Update panic-semihosting requirement from 0.5.3 to 0.6.0 in /examples/twi-ssd1306

[dependabot[bot]]

Updates the requirements on panic-semihosting to permit the latest version.

Changelog

Sourced from panic-semihosting's changelog.

[v0.6.0] - 2019-03-12

Fixed

• Fix numerous registers which were incorrectly included for thumbv6
• SHCRS renamed to SHCSR in SCB

Added

• Support for ARMv8-M (thumbv8.base and thumbv8.main)

• SCB gained methods to set and clear SLEEPONEXIT bit

• NVIC gained STIR register and methods to request an interrupt

• DCB gained methods to check if debugger is attached

[v0.5.8] - 2018-10-27

Added

• SCB gained methods to set, clear and check the pending state of the PendSV exception.

• SCB gained methods to set, clear and check the pending state of the SysTick exception.

• SCB gained methods to set and get the priority of system handlers like SVCall and SysTick.

• NVIC gained static methods, pend and unpend, to set and clear the pending state of interrupts.

Changed

• The NVIC.{clear,set}_pending methods have been deprecated in favor of NVIC::{unpend,pend}.

[v0.5.7] - 2018-09-06

Added

• DCB::enable_trace() and DCB::disable_trace()

Changed

• iprintln! no longer depends on iprint!. cortex_m::iprintln! will work even if cortex_m::iprint has not been imported.

[v0.5.6] - 2018-08-27

... (truncated)

Commits

• c61e3af Merge #135
• 3e580d9 v0.6.0
• 563c27a Merge #106
• 3b574e8 Merge #127
• 771fc84 Fix STIR register test, remove armv6m-related offsets in NVIC
• ac5f677 Merge #97
• 04ee333 Merge #126
• 2ff4735 Update is_debugger_attached so as not to clear S_RESET_ST and S_RETIRE_ST
• 2a15caa Fix rebase syntax error; disable STIR test on armv6m
• 595fbd7 Expand is_debugger_attached note
• Additional commits viewable in compare view

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