Handle watches of missing directories and make project the module resolution host

src/server/typingsCache.ts

@@ -89,12 +89,12 @@ namespace ts.server {
             if (forceRefresh ||
                 !entry ||
                 typeAcquisitionChanged(typeAcquisition, entry.typeAcquisition) ||
-                compilerOptionsChanged(project.getCompilerOptions(), entry.compilerOptions) ||
+                compilerOptionsChanged(project.getCompilationSettings(), entry.compilerOptions) ||
                 unresolvedImportsChanged(unresolvedImports, entry.unresolvedImports)) {
                 // Note: entry is now poisoned since it does not really contain typings for a given combination of compiler options\typings options.
                 // instead it acts as a placeholder to prevent issuing multiple requests
                 this.perProjectCache.set(project.getProjectName(), {
-                    compilerOptions: project.getCompilerOptions(),
+                    compilerOptions: project.getCompilationSettings(),
                     typeAcquisition,
                     typings: result,
                     unresolvedImports,
@@ -125,4 +125,4 @@ namespace ts.server {
             this.installer.onProjectClosed(project);
         }
     }
-}
+}