Updated a couple of files with "description" field. (#2203)

apex.json

@@ -1,4 +1,5 @@
 {
+    "description": "Apex lets you build, deploy, and manage AWS Lambda functions.",
     "homepage": "http://apex.run/",
     "license": "https://github.com/apex/apex/blob/master/LICENSE",
     "version": "0.16.0",

apngasm.json

@@ -1,4 +1,5 @@
 {
+    "description": "The next generation of apngasm, the APNG Assembler.",
     "homepage": "https://github.com/apngasm/apngasm",
     "version": "3.0.0",
     "url": "http://files.genshin.org/apngasm/apngasm-cli.7z",

armor.json

@@ -1,4 +1,5 @@
 {
+    "description": "Uncomplicated, modern HTTP server",
     "version": "0.4.7",
     "homepage": "https://github.com/labstack/armor",
     "license": "https://github.com/labstack/armor/blob/master/LICENSE",

artifact.json

@@ -1,4 +1,5 @@
 {
+    "description": "The open source design documentation tool",
     "version": "1.0.1",
     "homepage": "https://github.com/vitiral/artifact",
     "license": "LGPL",

pester.json

@@ -1,4 +1,5 @@
 {
+    "description": "Pester is a test and mock framework for PowerShell.",
     "version": "4.3.1",
     "license": "https://raw.githubusercontent.com/pester/Pester/master/LICENSE",
     "url": "https://github.com/pester/pester/archive/4.3.1.tar.gz",

xz.json

@@ -1,4 +1,5 @@
 {
+    "description": "XZ Utils is free general-purpose data compression software with a high compression ratio.",
     "homepage": "https://tukaani.org/xz/",
     "license": "https://tukaani.org/xz/#licensing",
     "version": "5.2.3",

yarn.json

@@ -1,5 +1,6 @@
 {
     "homepage": "https://yarnpkg.com/",
+    "description": "Dependency manager",
     "license": "BSD",
     "version": "1.6.0",
     "suggest": {

zstd.json

@@ -1,6 +1,7 @@
 {
     "homepage": "http://www.zstd.net/",
     "license": "https://github.com/facebook/zstd/blob/dev/LICENSE",
+    "description": "Zstandard is a real-time compression algorithm, providing high compression ratios.",
     "version": "1.3.4",
     "architecture": {
         "64bit": {