sourceMap.originalPositionFor is not a function

[Klotair]

Hello,

I'm getting the "sourceMap.originalPositionFor is not a function" issue since I'm trying to upgrade remap-istanbul from 0.8.6.
The #160 and #162 didn't helped me but I got the same stacktrace.

Here is my dep graph : Is there something wrong ?

npm ls -depth=0
├── UNMET PEER DEPENDENCY grunt@1.0.3
├── grunt-cli@1.2.0
├── grunt-contrib-uglify@0.2.7
├── istanbul-lib-instrument@1.10.1
├── jasmine-core@2.99.1
├── jasmine2-custom-message@0.9.2
├── karma@2.0.5
├── karma-chrome-launcher@2.2.0
├── karma-coverage@1.1.2
├── karma-html-detailed-reporter@1.1.21
├── karma-html-reporter@0.2.7
├── karma-jasmine@1.1.2
├── karma-junit-reporter@1.2.0
├── karma-phantomjs-launcher@1.0.4
├── karma-remap-istanbul@0.3.2
├── karma-summary-reporter@1.5.0
├── less@2.7.3
├── less-plugin-clean-css@1.5.1
└── remap-istanbul@0.11.1

[dylans]

fwiw, I'm working to update our dependencies and now our tests are failing with the same error