Master branch has failing tests

[RoboPhred]

A fresh checkout of the master branch produces failing tests.

Issues 1, 2, and 4 are fixed by #411, but this is blocked due to the remaining tests, which I have no accounting for.

  1402 passing (10s)
  85 pending
  7 failing

  1) jsonld.js
       JSON-LD Test Suite
         Compaction
           #tc028 Adding a minimal/empty property-scoped context should not affect the using terms defined in outer context.:

      AssertionError: expected { Object (@context, thing, ...) } to deeply equal { Object (@context, title, ...) }
      + expected - actual

           }
           "title": "ex:title"
         }
         "thing": {
      -    "ex:title": "sub"
      +    "title": "sub"
         }
         "title": "top"
       }

      at Object.compareExpectedJson [as compare] (tests/test-common.js:739:12)
      at async Context.<anonymous> (tests/test-common.js:551:11)

  2) jsonld.js
       JSON-LD Test Suite
         Expansion
           #tc036 Adding a minimal/empty property-scoped context should not affect expansion of terms defined in the outer scope.:

      AssertionError: expected [ Array(1) ] to deeply equal [ Array(1) ]
      + expected - actual

       [
         {
           "ex:thing": [
      -      {}
      +      {
      +        "ex:title": [
      +          {
      +            "@value": "sub"
      +          }
      +        ]
      +      }
           ]
           "ex:title": [
             {
               "@value": "top"

      at Object.compareExpectedJson [as compare] (tests/test-common.js:739:12)
      at async Context.<anonymous> (tests/test-common.js:551:11)

  3) jsonld.js
       JSON-LD Test Suite
         Expansion
           #ter54 The value of @type in a value object MUST be a string or null.:
     AssertionError: no error present: expected undefined to be truthy
      at compareExpectedError (tests/test-common.js:791:12)
      at Context.<anonymous> (tests/test-common.js:544:17)

  4) jsonld.js
       JSON-LD Test Suite
         Transform JSON-LD to RDF
           #tc036 Adding a minimal/empty property-scoped context should not affect expansion of terms defined in the outer scope.:

      AssertionError: expected '_:c14n0 <ex:thing> _:c14n1 .\n_:c14n0 <ex:title> "top" .\n' to equal '_:c14n0 <ex:thing> _:c14n1 .\n_:c14n0 <ex:title> "top" .\n_:c14n1 <ex:title> "sub" .\n'
      + expected - actual

       _:c14n0 <ex:thing> _:c14n1 .
       _:c14n0 <ex:title> "top" .
      +_:c14n1 <ex:title> "sub" .

      at Object.compareCanonizedExpectedNQuads [as compare] (tests/test-common.js:774:12)
      at async Context.<anonymous> (tests/test-common.js:551:11)

  5) jsonld.js
       JSON-LD Test Suite
         Transform JSON-LD to RDF
           #ter54 The value of @type in a value object MUST be a string or null.:
     AssertionError: no error present: expected undefined to be truthy
      at compareExpectedError (tests/test-common.js:791:12)
      at Context.<anonymous> (tests/test-common.js:544:17)

  6) jsonld.js
       JSON-LD Test Suite
         Transform JSON-LD to RDF
           #tli12 Tests list elements expanded to IRIs with a bad @base.:
     Error: N-Quads parse error on line 2.
      at Function.parse (node_modules/rdf-canonize/lib/NQuads.js:97:15)
      at Object.compareCanonizedExpectedNQuads [as compare] (tests/test-common.js:772:46)
      at async Context.<anonymous> (tests/test-common.js:551:11)

  7) jsonld.js
       JSON-LD Test Suite
         Transform JSON-LD to RDF
           #tli14 Tests list elements expanded to IRIs with a null @base.:
     TypeError: Cannot read property 'termType' of null
      at Function.serializeQuad (node_modules/rdf-canonize/lib/NQuads.js:222:10)
      at Function.serialize (node_modules/rdf-canonize/lib/NQuads.js:191:25)
      at jsonld.toRDF (lib/jsonld.js:685:27)
      at async Context.<anonymous> (tests/test-common.js:537:18)