fix: resolve absolute paths in nyc instrument (#1012)

Fixes #1014

Author: golonikum

index.js

@@ -212,7 +212,7 @@ NYC.prototype.instrumentAllFiles = function (input, output, cb) {
     }
 
     if (transform) {
-      code = transform(code, { filename: filename, relFile: inFile })
+      code = transform(code, { filename: inFile, relFile: inFile })
     }
 
     if (!output) {

test/nyc-integration.js

@@ -480,7 +480,7 @@ describe('the nyc cli', function () {
 
         proc.on('close', function (code) {
           code.should.equal(0)
-          stdout.should.match(/path:"\.\/half-covered\.js"/)
+          stdout.should.contain(`path:${JSON.stringify(path.resolve(fixturesCLI, 'half-covered.js'))}`)
           done()
         })
       })