Update to TypeScript 3.7 (#3275)

and update to prettier 1.19

Also, update `assert()` and remove not null assertions where possibly
in `cli`.

Closes #3273

1 files changed, 4 insertions, 6 deletions

diff --git a/std/testing/format.ts b/std/testing/format.ts
index 28937d567..953347c27 100644
--- a/std/testing/format.ts
+++ b/std/testing/format.ts
@@ -360,13 +360,11 @@ const getKeysOfEnumerableProperties = (object: {}): Array<string | symbol> => {
   const keys: Array<string | symbol> = Object.keys(object).sort();
 
   if (Object.getOwnPropertySymbols) {
-    Object.getOwnPropertySymbols(object).forEach(
-      (symbol): void => {
-        if (Object.getOwnPropertyDescriptor(object, symbol)!.enumerable) {
-          keys.push(symbol);
-        }
+    Object.getOwnPropertySymbols(object).forEach((symbol): void => {
+      if (Object.getOwnPropertyDescriptor(object, symbol)!.enumerable) {
+        keys.push(symbol);
       }
-    );
+    });
   }
 
   return keys;