fix: remove charset from tests

axios v0.21.2 [removes the charset from JSON Content-Type
headers](axios/axios#2154). This adjusts the
tests to compensate for that change.

src/axiosInterceptor.test.ts

@@ -74,7 +74,7 @@ describe("axios interceptor", () => {
     // Assert
     const request = moxios.requests.first();
     expect(request.headers["Content-Type"]).toEqual(
-      "application/json;charset=utf-8"
+      "application/json"
     );
   });
 
@@ -96,7 +96,7 @@ describe("axios interceptor", () => {
     // Assert
     const request = moxios.requests.first();
     expect(request.headers["Content-Type"]).toEqual(
-      "application/json;charset=utf-8"
+      "application/json"
     );
   });
 });

src/interceptor.test.ts

@@ -165,7 +165,7 @@ describe("interceptor", () => {
         region: "local",
         host: "example.com",
         body: '{"foo":"bar"}',
-        headers: { "Content-Type": "application/json;charset=utf-8" },
+        headers: { "Content-Type": "application/json" },
       },
       undefined
     );