deps: update old and remove unused dependencies

.travis.yml

@@ -1,13 +1,12 @@
 language: node_js
 node_js:
-- 8
-- 7
-- 6
+- 12
+- 10
 cache: npm
 jobs:
   include:
   - stage: github release
-    node_js: '6'
+    node_js: '12'
     deploy:
       provider: releases
       api_key:
@@ -17,7 +16,7 @@ jobs:
         tags: true
 
   - stage: npm release
-    node_js: '6'
+    node_js: '12'
     deploy:
       provider: npm
       email: [email protected]

CHANGELOG.md

@@ -10,6 +10,10 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 
 - Support for mTLS in v1.0 Binary and Structured Emitters: issue [#48](https://github.com/cloudevents/sdk-javascript/issues/48). Note that this fix is only valid for v1.0 and does not address the problem in v0.3 and below.
 
+### Removed
+
+- Removed support for Node.js 6, 7 and 8 - all of which are EOL at this point. Travis CI modified to test on Node.js 10 and 12.
+
 ## [1.0.0]
 
 ### Added

lib/bindings/http/emitter_binary.js

@@ -1,5 +1,4 @@
-const axios = require("axios");
-const empty = require("is-empty");
+var axios = require("axios");
 
 const Constants = require("./constants.js");
 const defaults = {};

lib/specs/spec_0_2.js

@@ -1,6 +1,5 @@
-const uuid  = require("uuid/v4");
-const empty = require("is-empty");
-const Ajv   = require("ajv");
+var uuid  = require("uuid/v4");
+var Ajv   = require("ajv");
 
 // Reserved attributes names
 const reserved = {

lib/specs/spec_0_3.js

@@ -1,5 +1,4 @@
 const uuid  = require("uuid/v4");
-const empty = require("is-empty");
 const Ajv   = require("ajv");
 
 const {

lib/specs/spec_1.js

@@ -1,7 +1,5 @@
 const uuid  = require("uuid/v4");
-const empty = require("is-empty");
 const Ajv   = require("ajv");
-const URI   = require("uri-js");
 
 const {
   asData,