Added 1.0.1 to CHANGELOG

[mnemonikr]

This adds the 1.0.1 release notes to the CHANGELOG and also updates the CI coverage to run the integration tests.

[mnemonikr]

Filename                      Regions    Missed Regions     Cover   Functions  Missed Functions  Executed       Lines      Missed Lines     Cover    Branches   Missed Branches     Cover
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
src/compiler.rs                    54                 9    83.33%           5                 1    80.00%          51                 4    92.16%           0                 0         -
src/ffi/sys.rs                      2                 0   100.00%           2                 0   100.00%          13                 0   100.00%           0                 0         -
tests/sleigh-compiler.rs           29                 5    82.76%           1                 0   100.00%          14                 1    92.86%           0                 0         -
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
TOTAL                              85                14    83.53%           8                 1    87.50%          78                 5    93.59%           0                 0         -