Upgrade to rules_nodejs 1.7.0 (bazelbuild#124)

rules_nodejs pre 1.6.0 had invalid escape sequences in its Starlark code, which was silently ignored but now throws an error (due to bazelbuild/bazel@73402fa).

package.bzl

@@ -26,8 +26,8 @@ def rules_sass_dependencies():
     _include_if_not_defined(
         http_archive,
         name = "build_bazel_rules_nodejs",
-        sha256 = "a54b2511d6dae42c1f7cdaeb08144ee2808193a088004fc3b464a04583d5aa2e",
-        urls = ["https://github.com/bazelbuild/rules_nodejs/releases/download/0.42.3/rules_nodejs-0.42.3.tar.gz"],
+        sha256 = "84abf7ac4234a70924628baa9a73a5a5cbad944c4358cf9abdb4aab29c9a5b77",
+        urls = ["https://github.com/bazelbuild/rules_nodejs/releases/download/1.7.0/rules_nodejs-1.7.0.tar.gz"],
     )
 
     # Dependencies from the NodeJS rules. We don't want to use the "package.bzl" dependency macro