Move option under 'strict'.

Author: DanielRosenwasser

src/compiler/checker.ts

@@ -354,6 +354,7 @@ namespace ts {
         const strictPropertyInitialization = getStrictOptionValue(compilerOptions, "strictPropertyInitialization");
         const noImplicitAny = getStrictOptionValue(compilerOptions, "noImplicitAny");
         const noImplicitThis = getStrictOptionValue(compilerOptions, "noImplicitThis");
+        const useUnknownInCatchVariables = getStrictOptionValue(compilerOptions, "useUnknownInCatchVariables");
         const keyofStringsOnly = !!compilerOptions.keyofStringsOnly;
         const freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : ObjectFlags.FreshLiteral;
 
@@ -8603,7 +8604,7 @@ namespace ts {
             const declaration = symbol.valueDeclaration;
             if (isCatchClauseVariableDeclarationOrBindingElement(declaration)) {
                 const decl = declaration as VariableDeclaration;
-                if (!decl.type) return compilerOptions.useUnknownInCatchVariables ? unknownType : anyType;
+                if (!decl.type) return useUnknownInCatchVariables ? unknownType : anyType;
                 const type = getTypeOfNode(decl.type);
                 // an errorType will make `checkTryStatement` issue an error
                 return isTypeAny(type) || type === unknownType ? type : errorType;

src/compiler/utilities.ts

@@ -6002,6 +6002,7 @@ namespace ts {
         | "strictBindCallApply"
         | "strictPropertyInitialization"
         | "alwaysStrict"
+        | "useUnknownInCatchVariables"
         ;
 
     export function getStrictOptionValue(compilerOptions: CompilerOptions, flag: StrictOptionName): boolean {