chore(deps): fix MappingItem type (vuejs#12891)

Author: edison1105

packages/compiler-sfc/__tests__/parse.spec.ts

@@ -81,7 +81,7 @@ font-weight: bold;
 
       const consumer = new SourceMapConsumer(script!.map!)
       consumer.eachMapping(mapping => {
-        expect(mapping.originalLine - mapping.generatedLine).toBe(padding)
+        expect(mapping.originalLine! - mapping.generatedLine).toBe(padding)
       })
     })
 
@@ -100,8 +100,8 @@ font-weight: bold;
 
       const consumer = new SourceMapConsumer(template.map!)
       consumer.eachMapping(mapping => {
-        expect(mapping.originalLine - mapping.generatedLine).toBe(padding)
-        expect(mapping.originalColumn - mapping.generatedColumn).toBe(2)
+        expect(mapping.originalLine! - mapping.generatedLine).toBe(padding)
+        expect(mapping.originalColumn! - mapping.generatedColumn).toBe(2)
       })
     })
 
@@ -115,7 +115,7 @@ font-weight: bold;
 
       const consumer = new SourceMapConsumer(custom!.map!)
       consumer.eachMapping(mapping => {
-        expect(mapping.originalLine - mapping.generatedLine).toBe(padding)
+        expect(mapping.originalLine! - mapping.generatedLine).toBe(padding)
       })
     })
   })

packages/compiler-sfc/src/compileTemplate.ts

@@ -289,7 +289,7 @@ function mapLines(oldMap: RawSourceMap, newMap: RawSourceMap): RawSourceMap {
 
     const origPosInOldMap = oldMapConsumer.originalPositionFor({
       line: m.originalLine,
-      column: m.originalColumn,
+      column: m.originalColumn!,
     })
 
     if (origPosInOldMap.source == null) {
@@ -305,7 +305,7 @@ function mapLines(oldMap: RawSourceMap, newMap: RawSourceMap): RawSourceMap {
         line: origPosInOldMap.line, // map line
         // use current column, since the oldMap produced by @vue/compiler-sfc
         // does not
-        column: m.originalColumn,
+        column: m.originalColumn!,
       },
       source: origPosInOldMap.source,
       name: origPosInOldMap.name,