feat: Static assert when initial states has sub states or initial sta…

[erikzenkerLogmein]

…te table

[codecov-commenter]

Codecov Report

Merging #179 (0bea97b) into master (589ad20) will increase coverage by 0.02%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #179      +/-   ##
==========================================
+ Coverage   97.76%   97.78%   +0.02%     
==========================================
  Files          79       80       +1     
  Lines        1117     1130      +13     
==========================================
+ Hits         1092     1105      +13     
  Misses         25       25              

Impacted Files	Coverage Δ
include/hsm/details/sm.h	100.00% <ø> (ø)
include/hsm/details/collect_initial_states.h	100.00% <100.00%> (ø)
test/integration/initial_state.cpp	100.00% <100.00%> (ø)
test/unit/collect_initial_states_tests.cpp	100.00% <100.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more