Bump versions (#304)

Signed-off-by: Ram <[email protected]>

Dockerfile

@@ -9,10 +9,10 @@ RUN apk --no-cache add \
     py3-pip \
     py3-wheel \
     python3 && \
-    pip install --upgrade pip==20.2.3
+    pip install --upgrade pip==20.2.4
 
 # Install a YAML Linter
-ARG yamllint_version=1.24.2
+ARG yamllint_version=1.25.0
 LABEL yamllint_version=$yamllint_version
 RUN pip install "yamllint==$yamllint_version"
 
@@ -22,7 +22,7 @@ LABEL yamale_version=$yamale_version
 RUN pip install "yamale==$yamale_version"
 
 # Install kubectl
-ARG kubectl_version=v1.19.2
+ARG kubectl_version=v1.19.4
 LABEL kubectl_version=$kubectl_version
 RUN curl -LO "https://storage.googleapis.com/kubernetes-release/release/$kubectl_version/bin/linux/amd64/kubectl" && \
     chmod +x kubectl && \