Merge pull request #13886 from Patater/too-old-requirements

Don't require too old mbed tools

Author: 0xc0170

requirements.txt

@@ -12,9 +12,9 @@ idna>=2,<2.8
 pyserial>=3,<=3.4
 Jinja2>=2.10.1,<2.11
 intelhex>=1.3,<=2.2.1
-mbed-ls>=1.5.1,<1.8
-mbed-host-tests>=1.4.4,<1.6
-mbed-greentea>=0.2.24,<1.8
+mbed-ls>=1.5.1,<2.0
+mbed-host-tests>=1.4.4,<2.0
+mbed-greentea>=0.2.24,<2.0
 beautifulsoup4>=4,<=4.6.3
 pyelftools>=0.24,<=0.25
 manifest-tool==1.5.2