Upgrade pyexcel-xls version

version 0.6.0 was accidently removed from pypi, see
https://github.com/pyexcel/pyexcel-xls/issues/40. the solution is to
upgrade to 0.6.1

requirements-app.txt

@@ -11,7 +11,7 @@ Flask-Login==0.5.0
 blinker==1.4
 pyexcel==0.6.5
 pyexcel-io==0.6.3
-pyexcel-xls==0.6.0
+pyexcel-xls==0.6.1
 pyexcel-xlsx==0.6.0
 pyexcel-ods3==0.6.0
 pytz==2020.1

requirements.txt

@@ -13,7 +13,7 @@ Flask-Login==0.5.0
 blinker==1.4
 pyexcel==0.6.5
 pyexcel-io==0.6.3
-pyexcel-xls==0.6.0
+pyexcel-xls==0.6.1
 pyexcel-xlsx==0.6.0
 pyexcel-ods3==0.6.0
 pytz==2020.1
@@ -34,10 +34,10 @@ prometheus-client==0.8.0
 gds-metrics==0.2.4
 
 ## The following requirements were added by pip freeze:
-awscli==1.18.159
+awscli==1.18.163
 bleach==3.1.4
 boto3==1.10.38
-botocore==1.18.18
+botocore==1.19.3
 cachetools==4.1.0
 certifi==2020.6.20
 chardet==3.0.4
@@ -55,7 +55,7 @@ idna==2.10
 jdcal==1.4.1
 Jinja2==2.11.2
 jmespath==0.10.0
-lml==0.0.9
+lml==0.1.0
 lxml==4.6.1
 MarkupSafe==1.1.1
 mistune==0.8.4
@@ -78,7 +78,7 @@ six==1.15.0
 smartypants==2.0.1
 statsd==3.3.0
 texttable==1.6.3
-urllib3==1.25.10
+urllib3==1.25.11
 webencodings==0.5.1
 Werkzeug==1.0.1
 WTForms==2.3.3