Check for newer pre-release only if running pre-release (#105)

Fixes: #86

![image](https://user-images.githubusercontent.com/2907397/69315345-28537680-0beb-11ea-919d-c9ffb6009fb4.png)

package.json

@@ -47,11 +47,11 @@
     "jest-expect-message": "^1.0.2",
     "lint-staged": "^8.1.7",
     "np": "^5.0.1",
+    "snyk": "^1.250.0",
     "ts-jest": "^24.0.2",
     "ts-node": "^8.1.0",
     "tsconfig-paths": "^3.8.0",
-    "typewriter": "^7.0.0-33",
-    "snyk": "^1.250.0"
+    "typewriter": "^7.0.0-33"
   },
   "dependencies": {
     "@hapi/joi": "^15.1.1",
@@ -72,6 +72,7 @@
     "node-machine-id": "^1.1.12",
     "prettier": "^1.17.0",
     "react": "^16.9.0",
+    "semver": "^6.3.0",
     "sort-keys": "^3.0.0",
     "typescript": "^3.4.5",
     "yargs": "^13.2.2"

src/cli/commands/version.tsx

@@ -4,6 +4,7 @@ import { version as typewriterVersion } from '../../../package.json'
 import latest from 'latest-version'
 import { StandardProps } from '../index'
 import { ErrorContext } from './error'
+import semver from 'semver'
 
 export const Version: React.FC<StandardProps> = () => {
 	const [isLoading, setIsLoading] = useState(true)
@@ -14,7 +15,16 @@ export const Version: React.FC<StandardProps> = () => {
 	useEffect(() => {
 		async function effect() {
 			try {
-				const latestVersion = await latest('typewriter', { version: 'next' })
+				let options: latest.Options = {}
+
+				// If the user is on a pre-release, check if there's a new pre-release.
+				// Otherwise, only compare against stable versions.
+				const prerelease = semver.prerelease(typewriterVersion)
+				if (prerelease && prerelease.length > 0) {
+					options = { version: 'next' }
+				}
+
+				const latestVersion = await latest('typewriter', options)
 				setLatestVersion(latestVersion)
 			} catch (error) {
 				// If we can't access NPM, then ignore this version check.

yarn.lock

@@ -6122,7 +6122,7 @@ semver@^5.0.3, semver@^5.1.0, semver@^5.5.0, semver@^5.5.1:
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
   integrity sha512-sauaDf/PZdVgrLTNYHRtpXa1iRiKcaebiKQ1BJdpQlWH2lCvexQdX55snPFyK7QzpudqbCI0qXFfOasHdyNDGQ==
 
-semver@^6.0.0, semver@^6.1.0, semver@^6.1.2, semver@^6.2.0:
+semver@^6.0.0, semver@^6.1.0, semver@^6.1.2, semver@^6.2.0, semver@^6.3.0:
   version "6.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
   integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==