Bump serverspec from 2.42.3 to 2.43.0

Bumps [serverspec](http://serverspec.org/) from 2.42.3 to 2.43.0.

---
updated-dependencies:
- dependency-name: serverspec
  dependency-version: 2.43.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

Gemfile.lock

@@ -2,7 +2,8 @@ GEM
   remote: https://rubygems.org/
   specs:
     ansi (1.5.0)
-    diff-lcs (1.5.0)
+    base64 (0.2.0)
+    diff-lcs (1.6.1)
     docker-api (2.4.0)
       excon (>= 0.64.0)
       multi_json
@@ -18,35 +19,36 @@ GEM
     net-scp (4.1.0)
       net-ssh (>= 2.6.5, < 8.0.0)
     net-ssh (7.3.0)
-    net-telnet (0.1.1)
+    net-telnet (0.2.0)
     rake (13.2.1)
-    rspec (3.12.0)
-      rspec-core (~> 3.12.0)
-      rspec-expectations (~> 3.12.0)
-      rspec-mocks (~> 3.12.0)
-    rspec-core (3.12.2)
-      rspec-support (~> 3.12.0)
-    rspec-expectations (3.12.3)
+    rspec (3.13.0)
+      rspec-core (~> 3.13.0)
+      rspec-expectations (~> 3.13.0)
+      rspec-mocks (~> 3.13.0)
+    rspec-core (3.13.3)
+      rspec-support (~> 3.13.0)
+    rspec-expectations (3.13.3)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-its (1.3.0)
-      rspec-core (>= 3.0.0)
-      rspec-expectations (>= 3.0.0)
-    rspec-mocks (3.12.6)
+      rspec-support (~> 3.13.0)
+    rspec-its (2.0.0)
+      rspec-core (>= 3.13.0)
+      rspec-expectations (>= 3.13.0)
+    rspec-mocks (3.13.2)
       diff-lcs (>= 1.2.0, < 2.0)
-      rspec-support (~> 3.12.0)
-    rspec-support (3.12.1)
+      rspec-support (~> 3.13.0)
+    rspec-support (3.13.2)
     schash (0.1.2)
-    serverspec (2.42.3)
+    serverspec (2.43.0)
       multi_json
       rspec (~> 3.0)
       rspec-its
       specinfra (~> 2.72)
     sfl (2.3)
-    specinfra (2.87.0)
+    specinfra (2.94.0)
+      base64
       net-scp
       net-ssh (>= 2.7)
-      net-telnet (= 0.1.1)
+      net-telnet
       sfl
     thor (1.2.1)