fix: base64 encoding of source maps with emojis (#14607)

This commit fixes source maps for files that contain emojis.

This is done by updating "deno_ast" to "0.14.1" for the case
of "--no-check" flag (ie using SWC emit) and by overriding
TSC's default base64 encoder (which turned out to be buggy)
for the type checking case.

cli/tsc/compiler.d.ts

@@ -8,7 +8,7 @@ declare global {
   namespace ts {
     var libs: string[];
     var libMap: Map<string, string>;
-
+    var base64encode: (host: ts.CompilerHost, input: string) => string;
     interface SourceFile {
       version?: string;
     }