reduce test coverage to 80% (#303)

Author: nicknisi

jest.config.ts

@@ -56,10 +56,10 @@ const config: Config = {
 
   coverageThreshold: {
     global: {
-      branches: 100,
-      functions: 100,
-      lines: 100,
-      statements: 100,
+      branches: 80,
+      functions: 80,
+      lines: 80,
+      statements: 80,
     },
   },
 };