Fix for AssertThatCollectionOrMap inspection sometimes causing an index out of bounds exception.

Added an settings option for AssertThatCollectionOrMap inspection respecting the degenerated case of maps with null values.
Upgrade to JUnit Jupiter 5.5.2.

README.md

@@ -247,6 +247,16 @@ You can toggle the various inspections in the Settings/Editor/Inspections in the
   from: assertThat(map.get(key)).isNull();
     to: assertThat(map).doesNotContainKey(key);
   ```
+  
+  The last transformation is the default, but may not be 100% equivalent depending whether the map
+  is a degenerated case with ```null``` values, where ```map.get(key)``` returns ```null```,
+  but ```containsKey(key)``` is ```true```.
+  For that special case (which usually is the result of a bad design decision!)
+  the quickfix should rather generate ```assertThat(map).containsEntry(key, null)```.
+  Therefore, the behavior can be configured in the settings for this inspection to either
+  create the default case (```doesNotContainKey```), the degenerated case (```containsEntry```),
+  choosing between both fixes (does not work well for batch processing), or ignore this edge case
+  altogether (just to be sure to not break any code).
 
 - AssertThatEnumerableIsEmpty
 
@@ -554,10 +564,16 @@ Feel free to use the code (in package ```de.platon42.intellij.jupiter```) for yo
 
 ## Changelog
 
+#### V1.5 (unreleased)
+- Fix for AssertThatCollectionOrMap inspection sometimes causing an index out of bounds exception.
+- Added an settings option for AssertThatCollectionOrMap inspection respecting the degenerated case of maps with ```null``` values.
+  It is now possible to change the behavior for ```map.get(key) == null```, so it can offer either ```.doesNotContainKey()``` (default)
+  or ```.containsEntry(key, null)```, or even both.
+
 #### V1.4 (25-Aug-19)
 - Minor fix for highlighting of JoinVarArgsContains inspection.
 - Extended AssertThatSize inspection to Maps, too.
-- Extended AssertThatCollectionOrMap inspection for several ```assertThat(map.get())``` cases as suggested by Stefan H.
+- Extended AssertThatCollectionOrMap inspection for several ```assertThat(map.get())``` cases as suggested by Georgij G.
 
 #### V1.3 (03-Aug-19)
 - New JoinVarArgsContains inspection that will detect multiple ```.contains()```, ```.doesNotContain()```,