Fix #123 - compatibility with native node@14 streams (#124)

* Set `autoDestroy` to `false` when defining `Source` streams for compatibility with node@14 native streams, and test in CI compatibility with native streams.

* Update .travis.yml

Co-authored-by: Mathias Buus <mathiasbuus@gmail.com>

.travis.yml

@@ -3,3 +3,5 @@ node_js:
   - '6'
   - '8'
   - '10'
+  - '12'
+  - '14'

extract.js

@@ -29,7 +29,7 @@ var mixinPax = function (header, pax) {
 var Source = function (self, offset) {
   this._parent = self
   this.offset = offset
-  PassThrough.call(this)
+  PassThrough.call(this, { autoDestroy: false })
 }
 
 util.inherits(Source, PassThrough)