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, 17 insertions, 19 deletions

diff --git a/std/util/deep_assign.ts b/std/util/deep_assign.ts
index 1dfc00a5b..b1c9f9ac9 100644
--- a/std/util/deep_assign.ts
+++ b/std/util/deep_assign.ts
@@ -8,26 +8,24 @@ export function deepAssign(
     if (!source || typeof source !== `object`) {
       return;
     }
-    Object.entries(source).forEach(
-      ([key, value]: [string, unknown]): void => {
-        if (value instanceof Date) {
-          target[key] = new Date(value);
-          return;
-        }
-        if (!value || typeof value !== `object`) {
-          target[key] = value;
-          return;
-        }
-        if (Array.isArray(value)) {
-          target[key] = [];
-        }
-        // value is an Object
-        if (typeof target[key] !== `object` || !target[key]) {
-          target[key] = {};
-        }
-        deepAssign(target[key] as Record<string, unknown>, value!);
+    Object.entries(source).forEach(([key, value]: [string, unknown]): void => {
+      if (value instanceof Date) {
+        target[key] = new Date(value);
+        return;
       }
-    );
+      if (!value || typeof value !== `object`) {
+        target[key] = value;
+        return;
+      }
+      if (Array.isArray(value)) {
+        target[key] = [];
+      }
+      // value is an Object
+      if (typeof target[key] !== `object` || !target[key]) {
+        target[key] = {};
+      }
+      deepAssign(target[key] as Record<string, unknown>, value!);
+    });
   }
   return target;
 }