Add test cases to cover object accessor wildcards

Author: nblumhardt

test/Serilog.Expressions.Tests/Cases/expression-evaluation-cases.asv

@@ -197,6 +197,12 @@ User.Name                            ⇶ 'nblumhardt'
 // Wildcards
 [1,2,3][?] > 2                       ⇶ true
 [1,2,3][*] > 2                       ⇶ false
+{k:'test'}[?] = 'test'               ⇶ true
+{k:'test'}[?] like 'test'            ⇶ true
+{k:'test'}[?] like 'TEST'            ⇶ false
+{k:'test'}[?] like 'TEST' ci         ⇶ true
+{k:'test'}[?] like '%TES%' ci        ⇶ true
+{k:'test'}[?] = 'none'               ⇶ false
 
 // Text and regex
 ismatch('foo', 'f')                  ⇶ true