Deprecate ES5

Author: jakebailey

src/compiler/commandLineParser.ts

@@ -579,7 +579,7 @@ export const targetOptionDeclaration: CommandLineOptionOfCustomType = {
     affectsModuleResolution: true,
     affectsEmit: true,
     affectsBuildInfo: true,
-    deprecatedKeys: new Set(["es3"]),
+    deprecatedKeys: new Set(["es3", "es5"]),
     paramType: Diagnostics.VERSION,
     showInSimplifiedHelpView: true,
     category: Diagnostics.Language_and_Environment,

src/compiler/program.ts

@@ -4526,6 +4526,9 @@ export function createProgram(_rootNamesOrOptions: readonly string[] | CreatePro
         });
 
         checkDeprecations("6.0", "7.0", createDiagnostic, createDeprecatedDiagnostic => {
+            if (options.target === ScriptTarget.ES5) {
+                createDeprecatedDiagnostic("target", "ES5");
+            }
             if (options.moduleResolution === ModuleResolutionKind.Node10) {
                 createDeprecatedDiagnostic("moduleResolution", "node10", /*useInstead*/ undefined, Diagnostics.Visit_https_Colon_Slash_Slashaka_ms_Slashts6_for_migration_information);
             }

src/compiler/types.ts

@@ -7659,6 +7659,7 @@ export const enum ScriptKind {
 export const enum ScriptTarget {
     /** @deprecated */
     ES3 = 0,
+    /** @deprecated */
     ES5 = 1,
     ES2015 = 2,
     ES2016 = 3,

src/server/protocol.ts

@@ -3284,6 +3284,7 @@ export const enum NewLineKind {
 export const enum ScriptTarget {
     /** @deprecated */
     ES3 = "es3",
+    /** @deprecated */
     ES5 = "es5",
     ES6 = "es6",
     ES2015 = "es2015",