Update CLI version to 1.7.3-chromium

Author: alejandroSuch

Dockerfile

@@ -3,7 +3,7 @@ FROM alexsuch/angular-cli:base
 LABEL authors="Alejandro Such <alejandro.such@gmail.com> , Mihai Bob <mihai.m.bob@gmail.com>"
 
 RUN apk update \
-  && yarn global add @angular/cli@1.7.0-beta.1 \
+  && yarn global add @angular/cli@1.7.3 \
   && ng set --global packageManager=yarn \
   && rm -rf /tmp/* /var/cache/apk/* *.tar.gz ~/.npm \
   && npm cache clear --force \

README.md

@@ -7,7 +7,7 @@
                |___/
 ```
 
-**@angular/cli:** 1.7.0-beta.1<br/>
+**@angular/cli:** 1.7.3<br/>
 **node:** 6.11.2<br/>
 **npm:** 3.10.10<br/>
 **yarn:** 0.27.5<br/>
@@ -22,19 +22,19 @@ This image has the same usage as Angular CLI (https://cli.angular.io/)
 ### Creating a project
 
 ```
-docker run -it --rm -w /app -v $(pwd):/app alexsuch/angular-cli:1.7.0-beta.1-chromium ng new my-project-name
+docker run -it --rm -w /app -v $(pwd):/app alexsuch/angular-cli:1.7.3-chromium ng new my-project-name
 ```
 
 ### Generating a component
 
 ```
-docker run -it --rm -w /app -v $(pwd)/my-project-name:/app alexsuch/angular-cli:1.7.0-beta.1-chromium ng g component sample-component
+docker run -it --rm -w /app -v $(pwd)/my-project-name:/app alexsuch/angular-cli:1.7.3-chromium ng g component sample-component
 ```
 
 ### Serving
 
 ```
-docker run -it --rm -w /app -v $(pwd)/my-project-name:/app -p 4200:4200 alexsuch/angular-cli:1.7.0-beta.1-chromium ng serve --host 0.0.0.0
+docker run -it --rm -w /app -v $(pwd)/my-project-name:/app -p 4200:4200 alexsuch/angular-cli:1.7.3-chromium ng serve --host 0.0.0.0
 ```
 
 ## Credits