Test tags (#97)

* Test tags

* Don't repeat tags when merging

src/commonMain/kotlin/io/github/detekt/sarif4k/Merging.kt

@@ -25,6 +25,7 @@ fun SarifSchema210.merge(other: SarifSchema210): SarifSchema210 {
 
 fun PropertyBag?.merge(other: PropertyBag?): PropertyBag? {
     return (this?.tags.orEmpty() + other?.tags.orEmpty())
+        .distinct()
         .takeIf { it.isNotEmpty() }
         ?.let { PropertyBag(it) }
 }

src/jvmTest/kotlin/io/github/detekt/sarif4k/SarifSerializerTest.kt

@@ -43,6 +43,9 @@ class SarifSerializerTest {
                                         startLine = 1,
                                         startColumn = 1
                                     )
+                                ),
+                                properties = PropertyBag(
+                                    tags = listOf("tag")
                                 )
                             )
                         )

src/jvmTest/resources/input_1.sarif.json

@@ -97,5 +97,11 @@
         }
       }
     }
-  ]
+  ],
+  "properties": {
+    "tags": [
+      "tag",
+      "tag1"
+    ]
+  }
 }

src/jvmTest/resources/input_2.sarif.json

@@ -97,5 +97,11 @@
         }
       }
     }
-  ]
+  ],
+  "properties": {
+    "tags": [
+      "tag",
+      "tag2"
+    ]
+  }
 }

src/jvmTest/resources/output.sarif.json

@@ -168,5 +168,12 @@
                 }
             }
         }
-    ]
+    ],
+    "properties": {
+        "tags": [
+            "tag",
+            "tag1",
+            "tag2"
+        ]
+    }
 }

src/jvmTest/resources/output_different_tool.sarif.json

@@ -184,5 +184,11 @@
                 }
             }
         }
-    ]
+    ],
+    "properties": {
+        "tags": [
+            "tag",
+            "tag1"
+        ]
+    }
 }

src/jvmTest/resources/test.sarif.json

@@ -21,6 +21,11 @@
                   "startColumn": 1,
                   "startLine": 1
                 }
+              },
+              "properties": {
+                "tags": [
+                  "tag"
+                ]
               }
             }
           ],