ci: pin versions nyc version for testing on old versions of node <= 9

Also removed Node.js version 0.6 GH fails to install it.

Closes jshttp#317
Same fix as jshttp/http-errors#109

.github/workflows/ci.yml

@@ -35,68 +35,54 @@ jobs:
         - Node.js 19.x
 
         include:
-        - name: Node.js 0.6
-          node-version: "0.6"
-          npm-i: mocha@1.21.5
-          npm-rm: nyc
-
         - name: Node.js 0.8
           node-version: "0.8"
           npm-i: mocha@2.5.3
           npm-rm: nyc
 
         - name: Node.js 0.10
           node-version: "0.10"
-          npm-i: mocha@3.5.3
-          npm-rm: nyc
+          npm-i: mocha@3.5.3 nyc@10.3.2
 
         - name: Node.js 0.12
           node-version: "0.12"
-          npm-i: mocha@3.5.3
-          npm-rm: nyc
+          npm-i: mocha@3.5.3 nyc@10.3.2
 
         - name: io.js 1.x
           node-version: "1.8"
-          npm-i: mocha@3.5.3
-          npm-rm: nyc
+          npm-i: mocha@3.5.3 nyc@10.3.2
 
         - name: io.js 2.x
           node-version: "2.5"
-          npm-i: mocha@3.5.3
-          npm-rm: nyc
+          npm-i: mocha@3.5.3 nyc@10.3.2
 
         - name: io.js 3.x
           node-version: "3.3"
-          npm-i: mocha@3.5.3
-          npm-rm: nyc
+          npm-i: mocha@3.5.3 nyc@10.3.2
 
         - name: Node.js 4.x
           node-version: "4.9"
-          npm-i: mocha@5.2.0
-          npm-rm: nyc
+          npm-i: mocha@5.2.0 nyc@11.9.0
 
         - name: Node.js 5.x
           node-version: "5.12"
-          npm-i: mocha@5.2.0
-          npm-rm: nyc
+          npm-i: mocha@5.2.0 nyc@11.9.0
 
         - name: Node.js 6.x
           node-version: "6.17"
-          npm-i: mocha@6.2.2
-          npm-rm: nyc
+          npm-i: mocha@6.2.2 nyc@14.1.1
 
         - name: Node.js 7.x
           node-version: "7.10"
-          npm-i: mocha@6.2.2
-          npm-rm: nyc
+          npm-i: mocha@6.2.2 nyc@14.1.1
 
         - name: Node.js 8.x
           node-version: "8.17"
-          npm-i: mocha@7.2.0
+          npm-i: mocha@7.2.0 nyc@14.1.1
 
         - name: Node.js 9.x
           node-version: "9.11"
-          npm-i: mocha@7.2.0
+          npm-i: mocha@7.2.0 nyc@14.1.1
 
         - name: Node.js 10.x
           node-version: "10.24"