fix: always assert

When performing try/catch blocks, and the catch represents a valid condition, we need to assert SOMETHING, or else the test is flagged as risky.
A simple assertion that we got a throwable works in these cases.

Author: weierophinney

src/MessageTrait.php

@@ -145,6 +145,7 @@ public function testWithHeaderInvalidArguments($name, $value)
             $initialMessage->withHeader($name, $value);
         } catch (TypeError|InvalidArgumentException $e) {
             // valid
+            $this->assertTrue($e instanceof Throwable);
         } catch (Throwable $e) {
             // invalid
             $this->fail(sprintf(
@@ -193,6 +194,7 @@ public function testWithAddedHeaderInvalidArguments($name, $value)
             $initialMessage->withAddedHeader($name, $value);
         } catch (TypeError|InvalidArgumentException $e) {
             // valid
+            $this->assertTrue($e instanceof Throwable);
         } catch (Throwable $e) {
             // invalid
             $this->fail(sprintf(

src/RequestIntegrationTest.php

@@ -103,6 +103,7 @@ public function testMethodWithInvalidArguments($method)
             $this->request->withMethod($method);
         } catch (InvalidArgumentException|TypeError $e) {
             // valid
+            $this->assertTrue($e instanceof Throwable);
         } catch (Throwable $e) {
             // invalid
             $this->fail(sprintf(

src/ResponseIntegrationTest.php

@@ -65,6 +65,7 @@ public function testStatusCodeInvalidArgument($statusCode)
             $this->response->withStatus($statusCode);
         } catch (InvalidArgumentException|TypeError $e) {
             // valid
+            $this->assertTrue($e instanceof Throwable);
         } catch (Throwable $e) {
             // invalid
             $this->fail(sprintf(

src/UriIntegrationTest.php

@@ -54,6 +54,7 @@ public function testWithSchemeInvalidArguments($schema)
             $this->createUri('/')->withScheme($schema);
         } catch (InvalidArgumentException|TypeError $e) {
             // valid
+            $this->assertTrue($e instanceof Throwable);
         } catch (Throwable $e) {
             // invalid
             $this->fail(sprintf(