writer-json-sarif: write endLine/endColumn unconditionally

... paired with each startLine/startColumn to be compatible
with `shellcheck-sarif` and `sarif-fmt`.

Resolves: #136
Closes: #167

Author: kdudka

src/lib/writer-json-sarif.cc

@@ -231,16 +231,14 @@ static void sarifEncodeLoc(object *pLoc, const Defect &def, unsigned idx)
     if (evt.line) {
         // line start/end
         object reg = {
-            { "startLine", evt.line }
+            { "startLine", evt.line },
+            { "endLine", evt.line + evt.vSize }
         };
-        if (0 < evt.vSize)
-            reg["endLine"] = evt.line + evt.vSize;
 
         // column start/end
         if (evt.column) {
             reg["startColumn"] = evt.column;
-            if (0 < evt.hSize)
-                reg["endColumn"] = evt.column + evt.hSize;
+            reg["endColumn"] = evt.column + evt.hSize;
         }
 
         locPhy["region"] = std::move(reg);

tests/csgrep/0080-sarif-writer-stdout.txt

@@ -60,7 +60,9 @@
                                 },
                                 "region": {
                                     "startLine": 6,
-                                    "startColumn": 1
+                                    "endLine": 6,
+                                    "startColumn": 1,
+                                    "endColumn": 1
                                 }
                             }
                         }
@@ -82,7 +84,9 @@
                                                     },
                                                     "region": {
                                                         "startLine": 6,
-                                                        "startColumn": 1
+                                                        "endLine": 6,
+                                                        "startColumn": 1,
+                                                        "endColumn": 1
                                                     }
                                                 },
                                                 "message": {
@@ -112,7 +116,9 @@
                                 },
                                 "region": {
                                     "startLine": 4,
-                                    "startColumn": 7
+                                    "endLine": 4,
+                                    "startColumn": 7,
+                                    "endColumn": 7
                                 }
                             }
                         }
@@ -134,7 +140,9 @@
                                                     },
                                                     "region": {
                                                         "startLine": 4,
-                                                        "startColumn": 7
+                                                        "endLine": 4,
+                                                        "startColumn": 7,
+                                                        "endColumn": 7
                                                     }
                                                 },
                                                 "message": {