Temporarily disable solidity-coverage Travis job.

.travis.yml

@@ -25,10 +25,11 @@ jobs:
       name: "Unit tests"
       script: npm run test
 
-    - stage: tests
+# solidity-coverage fails at parsing 0.5.x code
-      name: "Unit tests with coverage report"
+#    - stage: tests
-      script: npm run test
+#      name: "Unit tests with coverage report"
-      env: SOLIDITY_COVERAGE=true
+#      script: npm run test
+#      env: SOLIDITY_COVERAGE=true
 
     - stage: tests
       name: "Unit tests using solc nightly"