Use postman-echo to replace httpbin

__tests__/keepalive.test.ts

@@ -13,24 +13,24 @@ describe('basics', () => {
 
   it('does basic http get request with keepAlive true', async () => {
     const res: httpm.HttpClientResponse = await _http.get(
-      'http://httpbin.org/get'
+      'http://postman-echo.com/get'
     )
     expect(res.message.statusCode).toBe(200)
     const body: string = await res.readBody()
     const obj = JSON.parse(body)
-    expect(obj.url).toBe('http://httpbin.org/get')
+    expect(obj.url).toBe('http://postman-echo.com/get')
   })
 
   it('does basic head request with keepAlive true', async () => {
     const res: httpm.HttpClientResponse = await _http.head(
-      'http://httpbin.org/get'
+      'http://postman-echo.com/get'
     )
     expect(res.message.statusCode).toBe(200)
   })
 
   it('does basic http delete request with keepAlive true', async () => {
     const res: httpm.HttpClientResponse = await _http.del(
-      'http://httpbin.org/delete'
+      'http://postman-echo.com/delete'
     )
     expect(res.message.statusCode).toBe(200)
     const body: string = await res.readBody()
@@ -40,32 +40,32 @@ describe('basics', () => {
   it('does basic http post request with keepAlive true', async () => {
     const b = 'Hello World!'
     const res: httpm.HttpClientResponse = await _http.post(
-      'http://httpbin.org/post',
+      'http://postman-echo.com/post',
       b
     )
     expect(res.message.statusCode).toBe(200)
     const body: string = await res.readBody()
     const obj = JSON.parse(body)
     expect(obj.data).toBe(b)
-    expect(obj.url).toBe('http://httpbin.org/post')
+    expect(obj.url).toBe('http://postman-echo.com/post')
   })
 
   it('does basic http patch request with keepAlive true', async () => {
     const b = 'Hello World!'
     const res: httpm.HttpClientResponse = await _http.patch(
-      'http://httpbin.org/patch',
+      'http://postman-echo.com/patch',
       b
     )
     expect(res.message.statusCode).toBe(200)
     const body: string = await res.readBody()
     const obj = JSON.parse(body)
     expect(obj.data).toBe(b)
-    expect(obj.url).toBe('http://httpbin.org/patch')
+    expect(obj.url).toBe('http://postman-echo.com/patch')
   })
 
   it('does basic http options request with keepAlive true', async () => {
     const res: httpm.HttpClientResponse = await _http.options(
-      'http://httpbin.org'
+      'http://postman-echo.com'
     )
     expect(res.message.statusCode).toBe(200)
     await res.readBody()