chore: update versions of internal deps

Author: ulivz

packages/@vuepress/core/package.json

@@ -31,11 +31,11 @@
   "dependencies": {
     "@babel/core": "^7.0.0",
     "@vue/babel-preset-app": "^3.1.1",
-    "@vuepress/markdown": "^1.0.0-alpha.48",
-    "@vuepress/markdown-loader": "^1.0.0-alpha.48",
-    "@vuepress/plugin-last-updated": "^1.0.0-alpha.48",
-    "@vuepress/plugin-register-components": "^1.0.0-alpha.48",
-    "@vuepress/shared-utils": "^1.0.0-alpha.48",
+    "@vuepress/markdown": "^1.0.0-alpha.50",
+    "@vuepress/markdown-loader": "^1.0.0-alpha.50",
+    "@vuepress/plugin-last-updated": "^1.0.0-alpha.50",
+    "@vuepress/plugin-register-components": "^1.0.0-alpha.50",
+    "@vuepress/shared-utils": "^1.0.0-alpha.50",
     "autoprefixer": "^9.5.1",
     "babel-loader": "^8.0.4",
     "cache-loader": "^3.0.0",

packages/@vuepress/markdown-loader/package.json

@@ -18,7 +18,7 @@
     "generator"
   ],
   "dependencies": {
-    "@vuepress/markdown": "^1.0.0-alpha.48",
+    "@vuepress/markdown": "^1.0.0-alpha.50",
     "loader-utils": "^1.1.0",
     "lru-cache": "^5.1.1"
   },

packages/@vuepress/markdown/package.json

@@ -19,7 +19,7 @@
     "markdown"
   ],
   "dependencies": {
-    "@vuepress/shared-utils": "^1.0.0-alpha.48",
+    "@vuepress/shared-utils": "^1.0.0-alpha.50",
     "markdown-it": "^8.4.1",
     "markdown-it-anchor": "^5.0.2",
     "markdown-it-chain": "^1.3.0",
@@ -28,7 +28,7 @@
     "prismjs": "^1.13.0"
   },
   "devDependencies": {
-    "@vuepress/test-utils": "^1.0.0-alpha.48"
+    "@vuepress/test-utils": "^1.0.0-alpha.50"
   },
   "author": "Evan You",
   "maintainers": [

packages/@vuepress/test-utils/package.json

@@ -22,8 +22,8 @@
     "@babel/preset-env": "^7.0.0",
     "@types/jest": "^24.0.9",
     "@vue/test-utils": "^1.0.0-beta.29",
-    "@vuepress/core": "^1.0.0-alpha.48",
-    "@vuepress/shared-utils": "^1.0.0-alpha.48",
+    "@vuepress/core": "^1.0.0-alpha.50",
+    "@vuepress/shared-utils": "^1.0.0-alpha.50",
     "babel-jest": "^24.7.1",
     "execa": "^1.0.0",
     "jest": "^24.7.1",

packages/docs/package.json

@@ -1,6 +1,6 @@
 {
   "private": true,
-  "version": "1.0.0-alpha.48",
+  "version": "1.0.0-alpha.50",
   "name": "docs",
   "description": "docs of VuePress",
   "scripts": {
@@ -25,13 +25,13 @@
   },
   "homepage": "https://github.com/vuejs/vuepress#readme",
   "devDependencies": {
-    "@vuepress/plugin-back-to-top": "^1.0.0-alpha.48",
-    "@vuepress/plugin-google-analytics": "^1.0.0-alpha.48",
-    "@vuepress/plugin-medium-zoom": "^1.0.0-alpha.48",
-    "@vuepress/plugin-pwa": "^1.0.0-alpha.48",
-    "@vuepress/theme-vue": "^1.0.0-alpha.48",
+    "@vuepress/plugin-back-to-top": "^1.0.0-alpha.50",
+    "@vuepress/plugin-google-analytics": "^1.0.0-alpha.50",
+    "@vuepress/plugin-medium-zoom": "^1.0.0-alpha.50",
+    "@vuepress/plugin-pwa": "^1.0.0-alpha.50",
+    "@vuepress/theme-vue": "^1.0.0-alpha.50",
     "vue-toasted": "^1.1.25",
-    "vuepress": "^1.0.0-alpha.48",
+    "vuepress": "^1.0.0-alpha.50",
     "vuepress-plugin-flowchart": "^1.4.2"
   }
 }

packages/vuepress/package.json

@@ -29,8 +29,8 @@
   },
   "homepage": "https://github.com/vuejs/vuepress#readme",
   "dependencies": {
-    "@vuepress/core": "^1.0.0-alpha.48",
-    "@vuepress/theme-default": "^1.0.0-alpha.48",
+    "@vuepress/core": "^1.0.0-alpha.50",
+    "@vuepress/theme-default": "^1.0.0-alpha.50",
     "cac": "^6.3.9",
     "envinfo": "^7.2.0"
   },