Backport node 12 fixes.

Fix test suite with node.js 12

(cherry picked from commit b03278f)

Drop node.js 11 support, add 12

(cherry picked from commit 7796370)

prettier --write test/unexpectedMitm.js

(cherry picked from commit dde61b8)

.travis.yml

@@ -3,6 +3,6 @@ node_js:
   - '6'
   - '8'
   - '10'
-  - '11'
+  - '12'
 script: 'npm run ci'
 after_success: '<coverage/lcov.info ./node_modules/coveralls/bin/coveralls.js'

test/unexpectedMitm.js

@@ -2063,7 +2063,10 @@ describe('unexpectedMitm', () => {
         } else {
           expectedError = new Error(message);
         }
-        if (semver.satisfies(nodeJsVersion, '>=2.0.0')) {
+        if (
+          semver.satisfies(nodeJsVersion, '>=2.0.0') &&
+          semver.satisfies(nodeJsVersion, '<12')
+        ) {
           expectedError.message +=
             ' www.icwqjecoiqwjecoiwqjecoiwqjceoiwq.com:80';
           expectedError.host = 'www.icwqjecoiqwjecoiwqjecoiwqjceoiwq.com';