Use safe_update_tagblock from cli to suppress decode errors

[pwoods25443]

Closes #40

Add safe_update_tagblock() and use it from the cli

This will prevent the cli from failing if you pass a malformed tagblock that cannot be decoded. In this case the nmea line is passed to the output with no changes

[codecov]

Codecov Report

Merging #41 (5ad09ad) into dev (7d0a606) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev      #41      +/-   ##
==========================================
+ Coverage   98.43%   98.45%   +0.01%     
==========================================
  Files          27       28       +1     
  Lines        1469     1484      +15     
==========================================
+ Hits         1446     1461      +15     
  Misses         23       23              

Flag	Coverage Δ
unittests	98.45% <100.00%> (+0.01%)	⬆️

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Impacted Files	Coverage Δ
ais_tools/__init__.py	100.00% <100.00%> (ø)
ais_tools/cli.py	94.93% <100.00%> (ø)
ais_tools/tagblock.py	100.00% <100.00%> (ø)
tests/test_edge_cases.py	100.00% <100.00%> (ø)

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