Update phpspec (#157)

Update phpspec and phpspec-code-coverage

.travis.yml

@@ -25,7 +25,9 @@ matrix:
     fast_finish: true
     include:
         - php: 7.0
-          env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest" COVERAGE=true TEST_COMMAND="composer test-ci"
+          env: COMPOSER_FLAGS="--prefer-stable --prefer-lowest"
+        - php: 7.4
+          env: COVERAGE=true TEST_COMMAND="composer test-ci"
 
 before_install:
     - if [[ $COVERAGE != true ]]; then phpenv config-rm xdebug.ini || true; fi

composer.json

@@ -21,8 +21,8 @@
         "php-http/promise": "^1.0"
     },
     "require-dev": {
-        "phpspec/phpspec": "^2.4",
-        "henrikbjorn/phpspec-code-coverage" : "^1.0"
+        "phpspec/phpspec": "^4.3.4|^5.0|^6.0",
+        "friends-of-phpspec/phpspec-code-coverage" : "^4.1"
     },
     "autoload": {
         "psr-4": {

phpspec.ci.yml

@@ -4,7 +4,7 @@ suites:
         psr4_prefix: Http\Client
 formatter.name: pretty
 extensions:
-    - PhpSpec\Extension\CodeCoverageExtension
+    FriendsOfPhpSpec\PhpSpec\CodeCoverage\CodeCoverageExtension: ~
 code_coverage:
     format: clover
     output: build/coverage.xml