Merge pull request #626 from huafu/feature/upgrade-babel-and-fix-tsconfig

upgrade deps - coverage, caching and source-mapping fixes, ...

Author: kulshekhar

.github/ISSUE_TEMPLATE

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+<!-- First of all, check the troubleshooting wiki page for common issues at:
+https://github.com/kulshekhar/ts-jest/wiki/Troubleshooting -->
+
+## Issue <!-- describe the issue below -->:
+
+
+## Expected behavior <!-- describe the expected behavior below -->:
+
+
+## Output from debug log <!-- You can activate the debug logger by setting the environment variable TS_JEST_DEBUG="true" before running yarn test. The output of the logger will be in **<your_project_dir>/node_modules/ts-jest/debug.txt**, paste it below -->:
+```bash
+# content of debug.txt :
+
+```
+
+
+## Minimal repo <!-- If you haven't already, create the smallest possible repo that reproduces this issue by running `npm install` and `npm test`. This will speed up any fixes that this issue might need. Paste the minimal repo URL below -->:
+
+
+<!-- Optional (but highly recommended): Configure Travis (or your favorite system) with the minimal repo. This allows potential solutions to be tested against the minimal repo. This saves everyone time and avoids a lot of back and forth. -->