#123: Distinguishing nodeRemoved and nodeMoved events

[pavsergus]

There are some use cases where nodeRemoved event firing is undesirable and confusing.

[pavsergus]

Proposed as a fix for #123

[codecov]

Codecov Report

Merging #254 into develop will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff            @@
##           develop     #254   +/-   ##
========================================
  Coverage    92.13%   92.13%           
========================================
  Files           25       25           
  Lines         1030     1030           
  Branches       146      146           
========================================
  Hits           949      949           
  Misses          53       53           
  Partials        28       28

Impacted Files	Coverage Δ
src/tree-internal.component.ts	82.88% <100%> (ø)	⬆️

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