Add Python 3.9 to build

Author: gliptak

.github/workflows/test.yml

@@ -20,6 +20,7 @@ jobs:
       py36: 3.6
       py37: 3.7
       py38: 3.8
+      py39: 3.9
       pypy3: pypy3
     runs-on: ${{ matrix.os }}
     strategy:

docs/examples/error_hander/error_handler_0/setup.cfg

@@ -29,6 +29,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

docs/examples/error_hander/error_handler_1/setup.cfg

@@ -29,6 +29,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

exporter/opentelemetry-exporter-opencensus/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

exporter/opentelemetry-exporter-otlp/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

exporter/opentelemetry-exporter-prometheus/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

exporter/opentelemetry-exporter-zipkin/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

instrumentation/opentelemetry-instrumentation-opentracing-shim/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

opentelemetry-api/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

opentelemetry-instrumentation/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

opentelemetry-proto/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

opentelemetry-sdk/setup.cfg

@@ -32,6 +32,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

tests/util/setup.cfg

@@ -30,6 +30,7 @@ classifiers =
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
+    Programming Language :: Python :: 3.9
 
 [options]
 python_requires = >=3.5

tox.ini

@@ -5,47 +5,47 @@ envlist =
     ; Environments are organized by individual package, allowing
     ; for specifying supported Python versions per package.
     ; opentelemetry-api
-    py3{5,6,7,8}-test-core-api
+    py3{5,6,7,8,9}-test-core-api
     pypy3-test-core-api
 
     ; opentelemetry-proto
-    py3{5,6,7,8}-test-core-proto
+    py3{5,6,7,8,9}-test-core-proto
     pypy3-test-core-proto
 
     ; opentelemetry-sdk
-    py3{5,6,7,8}-test-core-sdk
+    py3{5,6,7,8,9}-test-core-sdk
     pypy3-test-core-sdk
 
     ; opentelemetry-instrumentation
-    py3{5,6,7,8}-test-core-instrumentation
+    py3{5,6,7,8,9}-test-core-instrumentation
     pypy3-test-core-instrumentation
 
     ; docs/getting-started
-    py3{5,6,7,8}-test-core-getting-started
+    py3{5,6,7,8,9}-test-core-getting-started
     pypy3-test-core-getting-started
 
     ; opentelemetry-exporter-jaeger
-    py3{5,6,7,8}-test-exporter-jaeger
+    py3{5,6,7,8,9}-test-exporter-jaeger
     pypy3-test-exporter-jaeger
 
     ; opentelemetry-exporter-opencensus
-    py3{5,6,7,8}-test-exporter-opencensus
+    py3{5,6,7,8,9}-test-exporter-opencensus
     ; exporter-opencensus intentionally excluded from pypy3
 
     ; opentelemetry-exporter-otlp
-    py3{5,6,7,8}-test-exporter-otlp
+    py3{5,6,7,8,9}-test-exporter-otlp
     ; exporter-otlp intentionally excluded from pypy3
 
     ; opentelemetry-exporter-prometheus
-    py3{5,6,7,8}-test-exporter-prometheus
+    py3{5,6,7,8,9}-test-exporter-prometheus
     pypy3-test-exporter-prometheus
 
     ; opentelemetry-exporter-zipkin
-    py3{5,6,7,8}-test-exporter-zipkin
+    py3{5,6,7,8,9}-test-exporter-zipkin
     pypy3-test-exporter-zipkin
 
     ; opentelemetry-opentracing-shim
-    py3{5,6,7,8}-test-core-opentracing-shim
+    py3{5,6,7,8,9}-test-core-opentracing-shim
     pypy3-test-core-opentracing-shim
 
     lint
@@ -80,7 +80,7 @@ changedir =
 
 commands_pre =
 ; Install without -e to test the actual installation
-  py3{5,6,7,8}: python -m pip install -U pip setuptools wheel
+  py3{5,6,7,8,9}: python -m pip install -U pip setuptools wheel
 ; Install common packages for all the tests. These are not needed in all the
 ; cases but it saves a lot of boilerplate in this file.
   test: pip install {toxinidir}/opentelemetry-api {toxinidir}/opentelemetry-sdk {toxinidir}/tests/util