Update tests baselines

Author: a-tarasyuk

tests/baselines/reference/api/tsserverlibrary.d.ts

@@ -2581,7 +2581,7 @@ declare namespace ts {
     }
     interface UpToDateHost {
         fileExists(fileName: string): boolean;
-        getModifiedTime(fileName: string): Date;
+        getModifiedTime(fileName: string): Date | undefined;
         getUnchangedTime?(fileName: string): Date | undefined;
         getLastStatus?(fileName: string): UpToDateStatus | undefined;
         setLastStatus?(fileName: string, status: UpToDateStatus): void;
@@ -2685,7 +2685,7 @@ declare namespace ts {
         resolveTypeReferenceDirectives?(typeReferenceDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
         getEnvironmentVariable?(name: string): string | undefined;
         createHash?(data: string): string;
-        getModifiedTime?(fileName: string): Date;
+        getModifiedTime?(fileName: string): Date | undefined;
         setModifiedTime?(fileName: string, date: Date): void;
         deleteFile?(fileName: string): void;
     }
@@ -3022,7 +3022,7 @@ declare namespace ts {
         getCurrentDirectory(): string;
         getDirectories(path: string): string[];
         readDirectory(path: string, extensions?: ReadonlyArray<string>, exclude?: ReadonlyArray<string>, include?: ReadonlyArray<string>, depth?: number): string[];
-        getModifiedTime?(path: string): Date;
+        getModifiedTime?(path: string): Date | undefined;
         setModifiedTime?(path: string, time: Date): void;
         deleteFile?(path: string): void;
         /**

tests/baselines/reference/api/typescript.d.ts

@@ -2581,7 +2581,7 @@ declare namespace ts {
     }
     interface UpToDateHost {
         fileExists(fileName: string): boolean;
-        getModifiedTime(fileName: string): Date;
+        getModifiedTime(fileName: string): Date | undefined;
         getUnchangedTime?(fileName: string): Date | undefined;
         getLastStatus?(fileName: string): UpToDateStatus | undefined;
         setLastStatus?(fileName: string, status: UpToDateStatus): void;
@@ -2685,7 +2685,7 @@ declare namespace ts {
         resolveTypeReferenceDirectives?(typeReferenceDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
         getEnvironmentVariable?(name: string): string | undefined;
         createHash?(data: string): string;
-        getModifiedTime?(fileName: string): Date;
+        getModifiedTime?(fileName: string): Date | undefined;
         setModifiedTime?(fileName: string, date: Date): void;
         deleteFile?(fileName: string): void;
     }
@@ -3022,7 +3022,7 @@ declare namespace ts {
         getCurrentDirectory(): string;
         getDirectories(path: string): string[];
         readDirectory(path: string, extensions?: ReadonlyArray<string>, exclude?: ReadonlyArray<string>, include?: ReadonlyArray<string>, depth?: number): string[];
-        getModifiedTime?(path: string): Date;
+        getModifiedTime?(path: string): Date | undefined;
         setModifiedTime?(path: string, time: Date): void;
         deleteFile?(path: string): void;
         /**