Pyubx2

What's Changed
* RC 1.2.43 by semuadmin in https://github.com/semuconsulting/pyubx2/pull/153

CHANGES:

1. Update min pynmeagps version to 1.0.37.

FIXES:

1. Fix typo in NAV-PVT definition - `difSoln` is now `diffSoln`. Fixes https://github.com/semuconsulting/pyubx2/issues/152. NB: any existing references to `msg.difSoln` will need to be changed to `msg.diffSoln` in user code.

**Full Changelog**: https://github.com/semuconsulting/pyubx2/compare/v1.2.42...v1.2.43

What's Changed
* Rc 1.2.42 by semuadmin in https://github.com/semuconsulting/pyubx2/pull/151

1. Internal refactoring to improve performance and exception handling.

What's Changed
* Rc 1.2.41 by semuadmin in https://github.com/semuconsulting/pyubx2/pull/150

1. Enhance stream exception handling.
2. Replace print() log statements with logger.
3. Enhance docstrings and comments.

**Full Changelog**: https://github.com/semuconsulting/pyubx2/compare/v1.2.40...v1.2.41

What's Changed
* Rc 1.2.40 by semuadmin in https://github.com/semuconsulting/pyubx2/pull/148

1. Internal field naming clarified and docstrings updated - no functional changes.

**Full Changelog**: https://github.com/semuconsulting/pyubx2/compare/v1.2.39...v1.2.40

What's Changed
* Rc 1.2.39 by semuadmin in https://github.com/semuconsulting/pyubx2/pull/142

FIXES:

1. Fix incorrect UBX MGA-GPS-EPH payload definition Fixes [141](https://github.com/semuconsulting/pyubx2/issues/141)

**Full Changelog**: https://github.com/semuconsulting/pyubx2/compare/v1.2.38...v1.2.39

What's Changed
* Release candidate 1.2.38 by semuadmin in https://github.com/semuconsulting/pyubx2/pull/140


1. Add val2sphp helper method to convert high precision (9dp) coordinate to separate standard and high precision components, as required by some CFG and NAV messages.
1. Add utc2itow helper method to convert utc datetime to GPS week number and time of week.
1. Add getinputmode helper method to determinate mode of input UBX message (SET or POLL). Add new pyubx2.UBXReader msgmode of SETPOLL (0x03), which will automatically determine input mode.

**Full Changelog**: https://github.com/semuconsulting/pyubx2/compare/v1.2.37...v1.2.38